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David Attenborough: The Truth About Climate Change (BBC - Part 1)

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    the evolution of life
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    not by natural events
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    but although
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    In the final program
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    extraordinary changes and its climate
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    up to him.
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    man will stay on earth
    should be any longer
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    or less.
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    the by the actions of.
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    And are these events related
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    You know I belong to the most
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    in green.
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    If
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    at the time I spoke those words.
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    New climatic extremes are
    now being the court.
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    if out there.
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    denying a special place in the world,
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    scientists have been collaborating
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    I set out to find them film
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    of the dinosaurs,
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    over the world
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    Still a recent event in the
    history of our planet.
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    in Australia.
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    that in the
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    is only an average
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    And so
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    I had no idea that we have been the
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    they spared and dominant
    species and I more
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    So,
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    There is no scientific
    evidence whatsoever.
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    might have unleashed forces
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    that figure
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    of landscapes
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    but it's only in the last decade
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    that is when females give birth to
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    had thousands of weather stations
    around the world.
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    nought-point 6 degrees
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    It contains an astonishing variety
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    but is the stuff floating around
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    that the whole intricate web of wildlife
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    In every part of the world.
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    than the animals at the
    top of the food chain,
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    We need to,
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    becoming a modest.
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    Well,
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    during a time of course,
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    The turn of the year,
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    I've been lucky enough to
    spend my time traveling
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    One species
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    has warmed
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    raise their cut.
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    Miquelon
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    with all the reserves only
    to raise their cubs.
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    farmers.
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    million years ago,
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    the polar bears.
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    in all it's marvelous
    and wonderful for us.
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    some good
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    around the world
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    and its spenders
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    Since life began
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    to hunt.
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    But the Arctic is now melting so fast
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    During the last 50 years
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    and everything in it.
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    is population is the most
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    by up to 3 degrees.
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    maybe
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    by just over
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    since the early 1980s over
    the last 25 years
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    Up to us.
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    It's a very rare sight to find triplets.
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    We live on 27 years ago I presented
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    tranquilized system so that he
    can check their body weight
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    and in the space that their on it.
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    each year.
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    from its very beginnings.
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    some
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    than that
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    is in turmoil.
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    mothers are going hungry
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    have global temperatures
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    going people
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    ecology of polar bears in relation
    to tie not of change
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    to one of Europe's hottest ever
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    It is very largely
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    by nearly a quarter
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    Dr.
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    also now.
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    with the planet's climate.
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    About 5% of the bears.
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    to the collapse of glasses
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    A series of traces
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    . And they're linking those changes
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    on one of the most urgent and ambitious
    endeavors in our history.
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    Might drought
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    it seems that our planet
    is being transformed
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    as to whether or not
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    Our weather
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    because the ice is melting
    earlier each year
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    I dealt with the arrival of human beings.
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    Their main prey are seals
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    of the whole animal kingdom
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    By tracking the Bears with such regularity
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    is our planet.
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    it will be treated to this
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    mankind.
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    things of that nature,
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    create so much havoc
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    and climates.
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    in the southern United States
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    how much
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    Once they come ashore in the sea ice melts
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    life on Earth.
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    looking at its wonders
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    it starts almost 2.5 thousand
    meters above sea level.
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    In recent years,
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    But no,
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    how can such a seemingly small rise
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    is one of the coldest places on
    earth outside the poll nobody.
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    over the past 25
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    many bad
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    be linked
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    have evolved to live both
    above and below the ice.
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    Indeed,
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    nought-point 6 of one degree Celsius.
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    they will give you.
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    Good.
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    that I've come
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    to assess their health.
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    before the ice melts,
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    environment.
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    on larger bears
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    This
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    all related to climb out of form.
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    a runt of the litter and it's
    not likely to survive.
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    Mountain glasses
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    and yet they now have
    extra mouths to feed.
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    We're seeing reductions in Cup survival,
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    is under 3.
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    The suppose indeed that
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    the net glass.
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    The inhabitants of the
    tiny Pacific islands
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    He then
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    and the less able to provide
    for their Cup.
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    hotel in the climate of fear.
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    They're trying to understand the unprecedented
    changes in our time
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    The mountain ranges of Patagonia
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    for 20 years
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    looks bleak
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    between years over years
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    representative species
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    could have contributed to the change
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    Diana semi
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    to the rising temperatures
    that they're measuring
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    in the Amazon
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    to think about the question
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    In the fall time
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    we take the weight and their length
    and weak calculate what we
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    They have been troubled by this problem
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    We caught more females with
    cubs had triplets.
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    And no species is more at risk
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    It wasn't all that uncommon
    to find triplets.
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    Through Mario Silva
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    around 4,000
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    What happens next.
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    what I or anybody else has been doing
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    for polar bears.
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    it has gone through
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    since 1930s of courses
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    it's getting progressively worse.
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    All.
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    That means that there is 3 weeks
    less feeding time for pregnant
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    and you're you seeing that
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    of the planet.
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    Cobb 2 straight line leg zero 6-9.
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    towards a sudden tip of South America.
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    that killed thousands of fish
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    Since 1900
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    here.
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    for Cobb one
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    8,000 miles away.
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    all their properties is
    they have been cowed
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    for the last few decades,
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    in the climate
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    and it's not hard to see all
    meal since last July.
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    really.
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    but we're not
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    to track down the polar
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    here and at times,
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    whether he likes it or not.
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    well
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    be connected to the intensity
    of forest fires
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    then
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    while some places have cooled a little
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    First he needs to find the best.
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    and check on their health.
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    is this the whole night was completely
    covered with icebergs.
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    door
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    20 years ago.
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    I think
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    not just these ones on the north
    Patagonian Ice Field but glasses
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    They been there.
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    And an extraordinary range of animals
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    The fact remains that man has
    an unprecedented control
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    but it does that
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    Patagonian Ice Field
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    JC allergist Dr. Stephen Harmison
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    since he first started stuck.
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    rising seas.
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    Earlier this year
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    and his team
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    have discovered that their
    numbers have declined
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    mother.
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    really
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    Nick to London
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    As temperatures rise so
    do those of the sea,
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    And so,
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    Which led to the death of 27,000 people.
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    . Russia's
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    causing sea levels to rise.
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    The rate of that class Immelt
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    The destruction of towns and cities
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    and we're looking at the population
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    If the current warming trend continues
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    means that sea levels will
    rise even higher.
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    I think to
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    It's essentially the weight of
    the bear divided by its length
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    that they grow to their
    full destructive power.
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    in the northern
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    24 and a half pounds
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    The
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    In the fall.
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    and it gives us a means to compare bears
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    on in most one.
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    In August 2005
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    he could run the entire electric
    grid of the United States for
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    The frozen surface of the sea
    creates a highly specialized
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    If next year is going to happen
    like this and much higher than
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    Square
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    Now
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    one of the Cubs is
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    In southern Greenland.
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    all over the planet
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    and what this means
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    climbing outside
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    is now 2 values
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    It is undoubtedly taking place.
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    this year
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    I've seen many changes
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    How you can expert Greg Holland
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    is slowly but steadily
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    coupled with the dresser melt
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    too.
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    several weeks.
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    and that
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    the future
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    won and.
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    I've been working on that all of
    us here in the Churchill area
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    is now accelerating.
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    that worse is yet to come.
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    calling them but now this year as they
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    give us a very
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    has been investigating what
    fueled Katrina's force.
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    In Hudson's Bay
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    what condition there and when the
    come ashore and we found that
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    We're seeing triplets born in the spring,
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    that last year,
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    will certainly be revisited by hurricanes,
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    like a trainer
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    tides rose to their highest
    level ever known
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    The global temperature rise is also
    being felt much higher up.
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    Most of the people now experiencing
    this high tide is much higher
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    know placed move.
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    studied population anywhere in the world.
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    before the mother wakes up.
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    flooding the homes of the islanders.
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    and and that gives us a very visual
    record what exactly is going
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    of time to go.
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    like the Arctic
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    but of course the climate of the Earth
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    call a body-body condition index.
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    Who would have come ashore last summer
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    The ground I'm standing on
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    And on land.
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    really
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    There are already plans
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    they must come ashore
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    By this time
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    to get the hurricane started and
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    will not say that one particular
    had can is caused by climate
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    Some fake MySpace
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    but they can only hunt
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    But
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    health problem for kids
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    rundown
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    All my
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    mothers will not have eaten
    for many months,
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    fun
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    gradual change
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    Really destructive winds
    are in the region.
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    more destructive
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    to be evacuated
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    and since then,
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    it
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    sets out each spring
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    The Patagonian Ice Field,
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    years or so low that the condition
    of these bears us declining.
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    from the surface high up
    into the atmosphere
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    He gives a very good record of climate
    change over the whole range
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    close to the north and south poles.
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    There are no
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    bears
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    the bears are forced to fast for
    anywhere from 4 months for most
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    It was here in about the 1870s
    and by about 19 the 1930s
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    guide binning in all those would be
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    shoreline the lake shoreline
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    the most dynamic ice fields on Earth.
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    The team has to work quickly to make
    their checks on their family
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    2.5 to 3 kilometers perhaps 2 miles
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    It's not just that sea level.
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    our rubbish everywhere
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    and it is so powerful,
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    Is melting at Sutton alarming rate.
  • 24:26 - 35:56
    from the sun.
  • 24:27 - 20:08
    air and water.
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    damaged by this.
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    one or more of those cubs is not
    making it through the fall.
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    parents up to 8 months for a female such
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    but the flow this company here.
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    Here we've got a female
    with a trip letter.
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    retreated another
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    is one of those who believes
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    subsidies.
  • 25:04 - 20:15
    so it's them
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    the ocean heat energy
  • 25:10 - 29:40
    it
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    3 weeks earlier
  • 25:13 - 28:06
    visual record of climate change
    and and the they should be no
  • 25:13 - 28:54
    above sea level.
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    has always been changing,
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    long before mankind
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    powerful influence on our climate.
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    It's the sun
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    They're all in recession pretty well
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    either because of some great,
  • 25:53 - 37:14
    It was much warmer than it is now.
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    Mississippi.
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    The tropical
  • 26:03 - 24:35
    The amount of ice flowing into the sea
  • 26:10 - 27:12
    And the one the tropical oceans,
  • 26:11 - 12:42
    this
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    To understand climate change
    in the southern hemisphere.
  • 26:11 - 22:32
    to New Zealand.
  • 26:13 - 28:35
    has been working in locations
    like the meth
  • 26:14 - 33:44
    I don't
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    of Tuvalu
  • 26:25 - 22:58
    tilts and changes it orbits around the sun
  • 26:27 - 36:09
    Greenhouse gases like carbon dioxide
  • 26:33 - 32:06
    sea temperatures in the Gulf of Mexico
    and the Atlantic were the
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    he's been studying how they've
    changed over that time.
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    it would have.
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    A typical hurricane,
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    We were hearing Martin 88
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    but according to
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    When Harry can Katrina breached
    the levees of New Orleans
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    In cycles of tense and often hundreds
    of thousands of years
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    act as a blanket around the earth
  • 26:58 - 19:59
    but now
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    The ice is now melting
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    They have other implications,
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    This remote part of Patagonia
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    the more destructive the
    hurricane can out.
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    and yet global temperatures were
    only 4 degrees lower than they
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    This is the first time
  • 27:18 - 31:08
    only
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    back up this valley.
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    reduce the greenhouse effect
    and cool the planet down.
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    Many are now making the connection
    between global warming
  • 27:28 - 29:21
    and this is how strong they shred
    the surface of the ocean into a
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    are already facing the realities
    of an invading sea.
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    we hardly get our boats in the ice front
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    Very worried
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    in the time of the dinosaurs.
  • 27:42 - 19:13
    See what I.
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    in the ages that followed.
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    to become so think
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    and those
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    a big
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    The highest,
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    no plant could grow because they
    need carbon to build their
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    that provides our planet
    with warmth and light.
  • 28:03 - 31:24
    and possibly more frequent.
  • 28:06 - 29:28
    doubt the climate change is happening.
  • 28:10 - 17:01
    This
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    he flooded.
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    We need to go to places like this.
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    at
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    The process requires that the oceans
    be warmer than about 26
  • 28:16 - 27:57
    prediction for tomorrow.
  • 28:16 - 25:27
    have contributed
  • 28:17 - 19:50
    This is the,
  • 28:18 - 20:49
    You can see that
  • 28:27 - 19:20
    and yet that's will go on that landscape
    is completely changed now
  • 28:32 - 43:03
    and is released back into the atmosphere
  • 28:34 - 36:24
    when they were
  • 28:42 - 33:43
    and so keeps a panic.
  • 28:42 - 37:32
    into
  • 28:45 - 18:27
    waste area,
  • 28:45 - 36:15
    Today
  • 28:47 - 28:08
    to mean changes
  • 28:51 - 18:02
    flood
  • 28:53 - 25:44
    everywhere.
  • 28:53 - 37:16
    their tissues and leaves
    and twigs and the like.
  • 28:54 - 22:17
    There is nowhere else to go.
  • 28:57 - 29:49
    I don't think there's any
    future for him to.
  • 29:02 - 26:53
    the same city
  • 29:04 - 16:35
    than
  • 29:04 - 30:47
    The intensity and sheer destructiveness
    of the Heineken
  • 29:05 - 16:26
    hasn't
  • 29:08 - 30:28
    The
  • 29:09 - 24:40
    and especially his
  • 29:10 - 42:40
    and is now
  • 29:12 - 39:55
    it stops our planet from freezing
    and so sustains life on Earth
  • 29:15 - 41:56
    so much carbon dioxide.
  • 29:16 - 31:07
    fear well you here
  • 29:21 - 36:12
    morass of sea and spray
  • 29:24 - 25:58
    Hurricane Katrina struck the
    coastline of Louisiana,
  • 29:26 - 27:57
    and without it,
  • 29:28 - 18:31
    If we look at what glasses and
    doing all around the world,
  • 29:28 - 30:30
    to be burned in the power station,
  • 29:29 - 25:13
    But on the islands where the highest
    point is less than 5 meters
  • 29:32 - 32:15
    prevent in the sun's energy from
    reflecting back into space.
  • 29:35 - 22:18
    has doubled in the last 10 years.
  • 29:36 - 33:56
    of
  • 29:37 - 29:59
    causing oceans to expand
  • 29:37 - 36:29
    to dramatic shift in my client
  • 29:41 - 18:23
    people thing these houses and.
  • 29:43 - 22:04
    they have
  • 29:47 - 34:07
    a layer
  • 29:48 - 24:49
    inside,
  • 29:52 - 33:03
    the kids swimming
  • 30:00 - 31:13
    At this open cast coal mine in China,
  • 30:02 - 33:32
    Jordanian
  • 30:08 - 26:00
    degrees Celsius.
  • 30:12 - 34:04
    This see-sawing in the Earth's climate
  • 30:17 - 29:08
    warming seas
  • 30:24 - 38:44
    the earth
  • 30:25 - 18:26
    PC
  • 30:30 - 38:23
    which provides electricity for hundreds
    of thousands of people.
  • 30:30 - 46:00
    All over the planet
  • 30:33 - 31:14
    These days,
  • 30:33 - 36:05
    would have been under 5 meters of water
  • 30:34 - 33:57
    If the city of New York had existed 160.
  • 30:36 - 27:27
    change.
  • 30:37 - 32:00
    It's become locked in a
    cycle of success if ice
  • 30:38 - 18:20
    for some of the population
  • 30:38 - 30:09
    carbon dioxide
  • 30:43 - 22:34
    Yes.
  • 30:47 - 30:09
    and because of global climate change
  • 30:48 - 25:01
    the global temperature would be minus 19
  • 30:56 - 23:27
    we tend
  • 30:56 - 39:36
    This year
  • 30:57 - 19:38
    tour
  • 31:08 - 32:19
    and with each cycle
  • 31:08 - 34:19
    Oil and gas
  • 31:12 - 24:06
    Wasn't the high sea temperatures
    that many Katrina so intense.
  • 31:13 - 34:25
    you can descend for 500m
  • 31:14 - 30:56
    when we talk of climate change,
  • 31:14 - 39:25
    taking carbon dioxide out
  • 31:17 - 37:50
    . The carbon dioxide back
    it was still below 300
  • 31:18 - 33:49
    It's a grim warning
  • 31:19 - 36:11
    the carbon re combines with oxygen
  • 31:21 - 22:12
    Boats
  • 31:21 - 29:02
    fossil fuel.
  • 31:21 - 36:24
    And it is the rate at which the
    carbon dioxide blanket is
  • 31:23 - 23:14
    high time
  • 31:23 - 26:35
    70 million years after that
  • 31:25 - 40:47
    all the coal is being carried
    up to the surface
  • 31:28 - 40:38
    Sickening.
  • 31:29 - 34:59
    You know.
  • 31:31 - 39:51
    goes on
  • 31:32 - 27:04
    that the Earth receives from the sun
  • 31:33 - 28:45
    and put it back into the atmosphere.
  • 31:40 - 32:33
    but is global warming of the
    changes we're now seeing
  • 31:49 - 31:21
    looking at this time.
  • 31:49 - 25:51
    in the debate about global warming.
  • 31:50 - 19:52
    disaster coordinator.
  • 31:52 - 32:13
    released the oxygen
  • 32:04 - 32:15
    a new phenomenon
  • 32:06 - 21:48
    highest ever recorded.
  • 32:11 - 41:01
    coal and.
  • 32:12 - 41:42
    within the
  • 32:14 - 27:16
    inside the house.
  • 32:16 - 48:26
    mass on Earth.
  • 32:19 - 42:59
    The temperature.
  • 32:25 - 34:36
    since the earth began
  • 32:28 - 28:42
    is used to fuel the development
    of the immensely powerful winds
  • 32:30 - 29:02
    30 thousand years later,
  • 32:32 - 37:53
    influence the climate.
  • 32:33 - 38:24
    When the trees died.
  • 32:33 - 41:23
    is manufactured.
  • 32:39 - 41:09
    Stephen
  • 32:41 - 31:33
    but unfortunately this
    stretch of coast song
  • 32:41 - 45:32
    Ice cap in which his glasses flow from
  • 32:42 - 33:23
    In particular,
  • 32:44 - 37:54
    there.
  • 32:47 - 45:07
    our environment
  • 32:48 - 28:49
    On the face fit
  • 32:49 - 36:51
    carbon dioxide seems to be a good thing
  • 32:53 - 37:33
    you know.
  • 32:54 - 31:16
    but it's here in the Gulf of Mexico
  • 32:54 - 36:35
    as carbon dioxide.
  • 32:56 - 25:58
    that is particularly important
  • 32:57 - 39:47
    without
  • 32:58 - 32:09
    which is around us.
  • 33:05 - 30:37
    much of our Paris was freezing.
  • 33:06 - 31:47
    cosmic event
  • 33:09 - 19:52
    to move out because and freight.
  • 33:11 - 43:04
    they were recording rising levels
    of that particular gas in there
  • 33:19 - 40:00
    If we have to take into account
  • 33:20 - 24:52
    traps the sun's energy
  • 33:23 - 36:54
    changes in the level
  • 33:24 - 30:35
    ever recorded.
  • 33:26 - 33:19
    yet global temperatures were
    less than 2 degrees warmer.
  • 33:28 - 22:01
    that we ourselves have brought about,
  • 33:30 - 38:30
    tissues.
  • 33:32 - 26:43
    changes.
  • 33:33 - 40:03
    We are
  • 33:35 - 46:46
    that is causing so much concern.
  • 33:44 - 22:57
    that the Mitchell becomes impossible
    to tell a difference between
  • 33:47 - 23:29
    roaming in forests,
  • 33:48 - 31:19
    don't only mean
  • 33:48 - 38:48
    appear.
  • 33:49 - 36:20
    And Greg Holland
  • 33:59 - 34:42
    Been on the edge of an ice pack
    some 2 kilometers high
  • 34:08 - 37:01
    reborn rearguard.
  • 34:16 - 24:57
    you know.
  • 34:22 - 45:35
    It was while I was making the living
    planet in the mid 1980s
  • 34:23 - 37:35
    in the amount of energy
    that the Earth receives
  • 34:23 - 34:04
    the great forests
  • 34:28 - 40:28
    that they
  • 34:30 - 43:01
    on the carbon.
  • 34:41 - 30:33
    an atmospheric disturbance over Africa
  • 34:45 - 29:16
    there is one
  • 34:54 - 23:36
    These natural changes
  • 34:57 - 36:40
    scientists were already detecting
    crucial changes in the
  • 35:01 - 35:12
    Although scientists
  • 35:05 - 36:06
    of of of bubbles
  • 35:12 - 29:04
    In the United States.
  • 35:17 - 32:41
    As you can see there's a massive
    rebuilding program underway,
  • 35:26 - 37:09
    the tide began to appreciate the
    crucial role of the atmosphere
  • 35:32 - 32:24
    and further warming the planet.
  • 35:39 - 48:59
    are maintained
  • 35:40 - 25:41
    ages.
  • 35:41 - 28:34
    2005 it was the worst season
  • 35:41 - 40:33
    cooling effect on the atmosphere
    because they were
  • 35:45 - 31:07
    Just outside the eye of the hurricane
  • 35:49 - 35:21
    periods and warm period
    throughout her history.
  • 36:03 - 31:28
    The carbon dioxide spreads evenly
    through the Earth's atmosphere.
  • 36:07 - 26:29
    became the turning point
  • 36:10 - 35:41
    the highest figure
  • 36:14 - 38:34
    when
  • 36:14 - 34:25
    are higher now
  • 36:16 - 28:47
    are today.
  • 36:17 - 36:18
    Thousand years ago
  • 36:18 - 40:19
    of atmosphere that wrapped
  • 36:20 - 37:42
    at minus 36 degrees.
  • 36:23 - 48:15
    is melting more quickly probably
    than any other comparable ice
  • 36:24 - 41:14
    thickening
  • 36:29 - 32:50
    through their pores.
  • 36:29 - 30:10
    the call
  • 36:34 - 43:24
    Now
  • 36:35 - 27:27
    He would have found dinosaurs
  • 36:37 - 29:09
    like a collision with a meteorite
  • 36:40 - 32:42
    composition of the atmosphere.
  • 36:45 - 28:06
    Left.
  • 36:50 - 42:30
    had a
  • 36:52 - 42:23
    The changes that we've seen
  • 36:55 - 38:27
    as you climb up away from the Earth the.
  • 37:01 - 46:01
    per million.
  • 37:10 - 23:42
    Not the amount amenities
  • 37:16 - 35:07
    Now the original
  • 37:16 - 31:18
    far below the glasses.
  • 37:20 - 33:54
    rising sea temperatures and the
    increasing strength of Vatican.
  • 37:20 - 29:01
    the world
  • 37:20 - 40:00
    it's.
  • 37:27 - 38:58
    but in Denver,
  • 37:35 - 21:57
    in the Earth's history.
  • 37:36 - 29:20
    taking in carbon dioxide and
    using the energy of the sun
  • 37:39 - 28:01
    we going to be more intense
  • 37:39 - 23:22
    the patterns of light
    energy playing on the
  • 37:41 - 36:52
    no war.
  • 37:43 - 24:44
    Why
  • 37:45 - 39:16
    this is a good compacted
  • 37:45 - 40:47
    with around 27280
  • 37:49 - 33:11
    or else because of some more slower
  • 37:50 - 46:10
    particular
  • 37:51 - 35:12
    Stephen Harrison
  • 37:53 - 39:04
    All that time ago.
  • 37:54 - 28:55
    freezing
  • 37:54 - 37:45
    I would have been
  • 38:00 - 43:31
    blast saw the light of day.
  • 38:05 - 32:27
    than they were thousands of years ago.
  • 38:06 - 36:49
    It's telling us that human activities
    are having a strong him.
  • 38:12 - 49:42
    and witness
  • 38:13 - 50:24
    about a particular moment in the past.
  • 38:17 - 42:57
    Burnley
  • 38:17 - 44:58
    and this huge proliferation
  • 38:24 - 33:15
    They were buried
  • 38:25 - 35:46
    But there's another
  • 38:34 - 51:44
    green band
  • 38:35 - 29:47
    Right at the bottom,
  • 38:36 - 50:37
    exchange takes place.
  • 38:42 - 34:45
    many glasses that make
    up the air we breathe,
  • 38:43 - 38:06
    we've seen in the past 600,000 years.
  • 38:48 - 35:40
    for Professor Bob Spicer
  • 38:49 - 34:10
    These leaves
  • 38:49 - 43:59
    Well,
  • 38:49 - 37:20
    Back on the claim it's,
  • 38:55 - 36:27
    through layer upon layer of rock
  • 38:55 - 31:17
    When I spoke those words
  • 38:58 - 49:58
    Colorado.
  • 39:03 - 33:46
    giving scientists a chance to investigate
  • 39:03 - 34:54
    fantastic record.
  • 39:04 - 40:46
    that many of the largest traders
  • 39:06 - 32:07
    and where we
  • 39:07 - 38:00
    They then break down on the
    carbon dioxide molecules
  • 39:20 - 28:13
    Over hundreds of millions of years
  • 39:20 - 41:01
    the fix that carbon
  • 39:23 - 40:24
    and retain the Cup.
  • 39:23 - 45:25
    The glasses a melting so fast.
  • 39:24 - 41:47
    The most recent record today are
    telling us that it's up to about
  • 39:27 - 38:19
    of what was once would and leaves
  • 39:34 - 39:46
    When I was a boy in the 1930s
  • 39:45 - 28:47
    beneath the earth's surface.
  • 39:46 - 36:17
    from the bubbles informed
  • 39:48 - 38:30
    An analysis of bubbles such as these
  • 39:49 - 53:49
    and between them.
  • 39:50 - 38:21
    20 years later
  • 39:51 - 37:23
    measurements were started 48
  • 39:53 - 36:15
    These layers are slowly buried
  • 39:55 - 44:28
    he knows that ice can preserve
    valuable evidence.
  • 39:59 - 36:50
    for all the
  • 40:05 - 44:37
    beneath the polar ice caps.
  • 40:11 - 34:32
    among the
  • 40:14 - 37:37
    from the top of the extinct
    volcano of money on lower
  • 40:19 - 40:31
    eventually before these layers of ice
  • 40:21 - 33:33
    for hundreds of thousands.
  • 40:24 - 38:16
    was driven by natural forces
  • 40:24 - 43:24
    I'm
  • 40:26 - 29:19
    Leaves absorb the gas from the atmosphere
  • 40:26 - 52:00
    Bridgestone Youzhny.
  • 40:28 - 51:59
    huge amounts of cotton dioxide.
  • 40:31 - 48:21
    In other words,
  • 40:34 - 35:55
    laboratory
  • 40:35 - 34:36
    and overtime
  • 40:38 - 31:10
    with the carbon still within
  • 40:38 - 30:10
    The greenhouse blanket the
  • 40:40 - 33:01
    becomes colder.
  • 40:41 - 49:21
    oxygen
  • 40:46 - 48:46
    for us
  • 40:59 - 46:10
    there is a greater bulk
  • 41:00 - 43:01
    to studies appliances
  • 41:05 - 51:25
    Wright round.
  • 41:06 - 36:18
    crushed and compressed
  • 41:10 - 37:54
    It's called the greenhouse effect
    and it prevented the planet from
  • 41:17 - 34:08
    when the ice
  • 41:19 - 45:20
    in shaping our climate.
  • 41:23 - 29:24
    5
  • 41:34 - 45:55
    could now be occurring.
  • 41:35 - 41:36
    kind of a fence sitter
  • 41:40 - 32:51
    parts
  • 41:40 - 53:21
    It's particularly worrisome because.
  • 41:43 - 42:46
    the wetness comes from the
    abundant Equatorial rains
  • 41:44 - 37:55
    on the trees
  • 41:46 - 40:50
    the Amazon region suffered its
    worst drought in 60 years.
  • 41:47 - 39:58
    380
  • 41:56 - 42:17
    Out of the atmosphere
  • 41:57 - 48:19
    explained by natural climate cycles.
  • 41:57 - 43:10
    in ways that we are just now learning
    can be quite devastating to
  • 42:01 - 47:41
    warmth
  • 42:03 - 40:14
    years ago,
  • 42:05 - 50:58
    , which disrupted the rainfall
    patterns in the forests.
  • 42:06 - 33:48
    It's an ideal place
  • 42:08 - 48:59
    was formed.
  • 42:19 - 41:30
    Nicol also
  • 42:20 - 42:43
    what we call the pre-industrial
    output before he wins were
  • 42:25 - 46:38
    hundreds of thousands of years'
    worth of ice core records
  • 42:27 - 34:50
    representing 10s of millions of years.
  • 42:27 - 49:20
    The world's coral reefs and other
    marine equivalent of the
  • 42:30 - 39:03
    in places like Antarctica and Greenland
    gives us that that that's
  • 42:32 - 44:16
    is taking the opportunity to descend
    deep into a pair of us in the
  • 42:35 - 36:18
    we have the opposite effect
    we warm up the atmosphere.
  • 42:35 - 37:58
    You have to see how come not citing
    changed with the pattern
  • 42:44 - 49:35
    In 2005
  • 42:51 - 55:21
    But when you touch,
  • 42:54 - 55:35
    growing on who was under when we cut it.
  • 42:56 - 38:08
    When such fuels averting
  • 42:58 - 48:20
    greenhouse gases involved
    in climate change
  • 42:59 - 40:40
    As a result,
  • 43:01 - 31:33
    That's nice one,
  • 43:01 - 47:13
    atmosphere oxygen and carbon dioxide
  • 43:02 - 32:53
    You,
  • 43:04 - 39:51
    . The first regular
  • 43:10 - 52:30
    the forest.
  • 43:14 - 31:06
    brief Miles this
  • 43:15 - 50:47
    in covering an even more sinister threat
  • 43:16 - 51:08
    you're through years layer
    after layer of snow
  • 43:18 - 36:30
    In Patagonia is ice fields
  • 43:20 - 32:04
    But how can we possibly know
    that carbon dioxide levels
  • 43:24 - 29:56
    of carbon dioxide.
  • 43:25 - 45:45
    we.
  • 43:30 - 29:04
    That blanket extends for
    miles above the earth's
  • 43:31 - 33:33
    Some 50 million years ago
  • 43:31 - 44:14
    We need to know about how come
    a dark side has changed the
  • 43:33 - 38:56
    is often referred to as
    the lungs of the world
  • 43:37 - 32:19
    Is become thinner.
  • 43:40 - 39:03
    huge gaps open up in the summer months,
  • 43:44 - 48:36
    in the ice fields as originally
    contained it
  • 43:44 - 50:44
    and
  • 43:48 - 49:40
    and the alchemy that shelter inside them.
  • 43:51 - 46:04
    A relationship established hundreds
    of millions of years ago
  • 43:53 - 39:04
    starting to have a team
  • 43:59 - 48:19
    this
  • 44:01 - 49:21
    Yes.
  • 44:06 - 39:48
    over hundreds of thousands of years.
  • 44:10 - 57:41
    Then 27 years ago
  • 44:14 - 39:46
    concentrations of change in the atmosphere
  • 44:16 - 37:42
    . It's risky.
  • 44:18 - 51:28
    Premier League.
  • 44:20 - 46:01
    it's here,
  • 44:26 - 37:07
    envelope
  • 44:29 - 44:20
    around the world,
  • 44:34 - 50:24
    they've had
  • 44:37 - 44:59
    I mean for Professor marks a rare as
  • 44:37 - 51:38
    have still not recovered.
  • 44:42 - 39:55
    Latinos and past climates,
  • 44:49 - 50:13
    That record is now also preserved
    thousands of miles away.
  • 44:49 - 43:40
    them deforestation
  • 44:52 - 35:34
    there's an accumulation of snow
  • 44:53 - 53:06
    seemed won a huge unblemished
    and healthy world of its own.
  • 44:57 - 45:09
    What we see here are layers of fossils
  • 45:02 - 50:03
    which stretches in a broken
  • 45:02 - 48:33
    The lack of rain,
  • 45:03 - 29:55
    very close to the top
  • 45:09 - 41:02
    has spent the last 20 years studying
  • 45:10 - 32:41
    Yes.
  • 45:11 - 45:03
    and in spite of intensive logging
  • 45:13 - 45:34
    of the basin,
  • 45:15 - 42:18
    if we want to understand the
    the role of carbon dioxide
  • 45:16 - 38:39
    the thickness reached 382
  • 45:16 - 39:47
    are dying.
  • 45:25 - 41:18
    The potentially invaluable
    records of the past
  • 45:27 - 41:28
    in Hawaii.
  • 45:29 - 50:59
    for the.
  • 45:33 - 48:14
    a brilliant bike.
  • 45:34 - 49:55
    it's an effect 30%
  • 45:36 - 40:49
    because when a drought comes often
    with very little warning
  • 45:49 - 52:30
    He and other scientists
  • 45:50 - 50:00
    they had
  • 45:55 - 46:46
    Even in places
  • 45:59 - 40:31
    Right now we're measuring how much
  • 46:00 - 45:51
    of heat and likely.
  • 46:01 - 37:32
    but the weather
  • 46:01 - 43:53
    and it's within these layers of ice
  • 46:04 - 54:34
    Ove Hoegh
  • 46:06 - 46:37
    on this whole idea
  • 46:06 - 57:57
    a former self getting really concerned
  • 46:09 - 52:19
    Carlson
  • 46:18 - 43:31
    as a sort of as a thermal
    blanket over the earth.
  • 46:24 - 42:05
    and can be found
  • 46:31 - 45:44
    is worrying marine biologist
    Ove Hoegh Guldberg.
  • 46:33 - 45:24
    life within them
  • 46:42 - 38:53
    The Emerson
  • 46:45 - 47:36
    anywhere else at all
  • 46:45 - 54:26
    Everywhere and up.
  • 46:47 - 54:28
    exactly what is predicted,
  • 46:49 - 50:09
    you know.
  • 46:58 - 43:02
    The 2000 kilometer long Great
    Barrier Reef in Australia
  • 47:09 - 49:12
    Scientists don't pretend that they
    can predict specific changes to
  • 47:17 - 40:31
    Carbon dioxide is a as an important
    driver of climate change.
  • 47:18 - 52:18
    here
  • 47:24 - 45:25
    up in the canopy
  • 47:25 - 60:15
    rather than days
  • 47:30 - 40:34
    In this store room of the United
    States national ice core
  • 47:33 - 51:23
    down
  • 47:35 - 39:36
    is drought
  • 47:41 - 52:43
    Last year's drought caught
    assault by surprise
  • 47:44 - 60:44
    I just saved
  • 47:44 - 51:05
    in the,
  • 47:45 - 47:37
    may look like some fantastic
  • 47:46 - 58:17
    and later after they don't
  • 47:48 - 44:20
    We're just right now getting a handle on
  • 47:50 - 35:15
    These ice cores have been extracted
    from as much as 3 kilometers
  • 47:52 - 47:34
    You can see the ice here
    is absolutely full
  • 47:53 - 42:35
    in changing the global climate.
  • 47:54 - 51:35
    protect our future climber.
  • 48:08 - 37:39
    artists.
  • 48:14 - 55:45
    This is the cost of the out,
  • 48:21 - 43:33
    is that important factor in in
  • 48:25 - 55:57
    between the tiny animal coral polyps
  • 48:26 - 32:58
    You can see them out of water,
  • 48:27 - 54:48
    enormous trees,
  • 48:28 - 42:51
    jungle of plants and flowers.
  • 48:29 - 49:52
    each one provides a valuable
    source of information
  • 48:30 - 64:51
    . And
  • 48:32 - 48:25
    It's the type of ocean heating and
    it seems to cause the drought
  • 48:33 - 40:36
    led to a catastrophic fall in river levels
  • 48:33 - 42:17
    is it your full of forest fire because
    of the drought of 2005.
  • 48:36 - 40:47
    past
  • 48:36 - 40:41
    for here plants taken vast volumes
    of carbon dioxide and give out
  • 48:39 - 38:10
    snow
  • 48:43 - 48:36
    that we can tell all kinds of things
    about deep that the Earth's
  • 48:45 - 50:48
    I was unaware of a new and
    disturbing phenomenon.
  • 48:46 - 51:58
    Early in the life on Earth series
  • 48:47 - 46:48
    from the tropical sun
  • 48:48 - 47:59
    all that's left of the
  • 48:50 - 47:54
    contributing to a model that scientists
    like Peter Cox can use to
  • 48:52 - 38:36
    to appreciate the immensity of the
    greenery where this gaseous
  • 48:53 - 41:57
    seem to be much too strong much
    too radical to be just simply
  • 48:58 - 54:49
    the time glitz golf
  • 48:58 - 64:29
    that future events may happen.
  • 48:59 - 36:21
    And of course the bubbles contain
  • 49:00 - 44:52
    every year on the top of Greenland,
  • 49:02 - 48:03
    as predicted if
  • 49:04 - 43:26
    under increasing strain.
  • 49:08 - 62:59
    formation of clouds in the atmosphere
  • 49:10 - 55:13
    and though it to the very extreme
    2003 summer we've suffered in
  • 49:13 - 42:15
    come from the Greenland ice sheet.
  • 49:13 - 54:35
    vast areas of this phone is still survive.
  • 49:15 - 63:47
    Where everything from the melting
    ice in the Arctic to the
  • 49:18 - 42:20
    oxides in the atmosphere,
  • 49:18 - 45:49
    this Congress.
  • 49:20 - 58:11
    and silicone struggling,
  • 49:21 - 46:53
    If you talk to be 5 years ago
  • 49:23 - 54:03
    this leaf
  • 49:25 - 42:37
    in the Amazon last year that is
  • 49:25 - 47:06
    is using approved
  • 49:26 - 47:18
    The tropical rainforest,
  • 49:27 - 44:59
    what we find today is at the carbonate
  • 49:31 - 55:22
    I tells me that you know
  • 49:32 - 58:14
    the climate with absolute certainty.
  • 49:32 - 64:15
    are represented by solemnly leap,
  • 49:40 - 44:13
    chunk of ice was about 16,000 years old
  • 49:40 - 44:14
    how many hundreds of thousands
    of square kilometers of forest
  • 49:42 - 39:24
    What we've seen now.
  • 49:46 - 41:27
    for warmth
  • 49:49 - 36:13
    oxide concentrations in the atmosphere
    are higher than anything
  • 49:51 - 59:43
    is a one in 200 year type of event,
  • 49:52 - 61:43
    but if the warming continues.
  • 49:56 - 40:28
    decimating the fish popular.
  • 49:56 - 49:07
    and more severe head
  • 50:10 - 42:21
    hopeful who worry.
  • 50:13 - 38:34
    Not
  • 50:14 - 44:17
    were severely damaged by a drought killing
  • 50:16 - 53:07
    which are absorbing
  • 50:21 - 44:53
    water stress the tree that
  • 50:23 - 44:46
    has seen temperatures are abnormally high.
  • 50:31 - 58:54
    is like a virtual world a
    sort of flight simulator.
  • 50:35 - 45:18
    It if we measure this in parts
    per million of carbon
  • 50:35 - 62:37
    is twice as likely as it was before
    we started to click change the
  • 50:37 - 51:09
    You have to get up into the branches,
  • 50:42 - 58:02
    the reef
  • 50:49 - 51:49
    of.
  • 50:52 - 55:34
    I described the intimate relationship
  • 50:53 - 60:53
    most of the
  • 50:54 - 57:04
    The reason
  • 50:56 - 47:17
    But the Amazon
  • 51:00 - 46:11
    now at risk.
  • 51:01 - 52:52
    and the call may die
  • 51:02 - 51:23
    he has discovered
  • 51:05 - 47:57
    this is the 3rd bleaching event
  • 51:09 - 50:21
    some 50m about the ground.
  • 51:10 - 61:41
    and the temperatures of the oceans
  • 51:16 - 51:59
    but they contain older complex they
    contain clouds they contain
  • 51:19 - 40:41
    it affects not just
  • 51:27 - 60:19
    in the last 90 years of the Great
    Barrier anything and everything
  • 51:29 - 63:39
    Those villages
  • 51:30 - 42:05
    The drought was linked to the abnormally
    warm seas in the Atlantic
  • 51:30 - 51:41
    Devastating thought
  • 51:38 - 49:49
    from space.
  • 51:44 - 53:15
    than they had previously.
  • 51:55 - 54:55
    and
  • 51:56 - 49:08
    in early 2006
  • 51:58 - 50:50
    comes from 2 main courses
  • 51:59 - 51:51
    and began to affect our lives in every way
  • 52:02 - 54:42
    existing
  • 52:02 - 52:33
    Now the wind is blowing.
  • 52:05 - 58:45
    So you know
  • 52:10 - 54:33
    rainforest teeming with countless
    different species.
  • 52:11 - 53:42
    one or 2%
  • 52:12 - 59:42
    This year
  • 52:15 - 44:46
    the stone.
  • 52:15 - 44:56
    If you cut off.
  • 52:15 - 50:17
    He killed many people
    in France for example
  • 52:20 - 46:12
    So it may well be the river
  • 52:22 - 44:34
    6 months after the drought
  • 52:22 - 54:04
    smothering fields and villages.
  • 52:23 - 54:54
    in the area.
  • 52:29 - 44:30
    What I think
  • 52:31 - 66:21
    There was also sold
  • 52:32 - 45:44
    it has a hard being incongruous
  • 52:33 - 57:14
    More and more sensitive and.
  • 52:37 - 39:18
    of
  • 52:39 - 57:02
    many villages have deserted
    their homes for the cities.
  • 52:40 - 56:51
    So you know it's not on the radar
  • 52:41 - 43:25
    So you can see that today if levels
    are far beyond anything that
  • 52:43 - 48:06
    What we're seeing now is
    the impact of humans
  • 52:44 - 40:27
    Dan never stat is finding that the trees
  • 52:45 - 49:26
    of the jungle.
  • 52:47 - 50:38
    you might have noticed.
  • 52:49 - 60:50
    Then the out he won't return
  • 52:50 - 48:21
    reflect the skeletons
  • 52:51 - 43:23
    could be the 2006
  • 52:51 - 56:01
    and
  • 52:56 - 41:09
    humans are starting to change
    the climate itself.
  • 52:57 - 44:48
    multicolored
  • 52:59 - 60:59
    each one
  • 52:59 - 54:19
    you
  • 53:03 - 64:05
    must endure a daily battle
    with the encroaching
  • 53:07 - 47:10
    is not the only rich ecosystem
  • 53:08 - 55:08
    That
  • 53:11 - 64:41
    called White out
  • 53:18 - 56:38
    Climate
  • 53:20 - 43:11
    Lately.
  • 53:22 - 52:54
    is one of the wonders of the world.
  • 53:26 - 52:49
    is sea temperatures remain
    high for too long.
  • 53:27 - 63:38
    completely create a standstill.
  • 53:30 - 54:23
    of life both animal and plant
    and the greater diversity too
  • 53:32 - 66:43
    are suffering from severe drought
  • 53:39 - 55:29
    The
  • 53:42 - 52:53
    Those changes
  • 53:44 - 45:15
    crunch
  • 53:46 - 54:47
    are severely damaged
  • 53:49 - 54:01
    Those 2 factors have created the jungle
  • 53:54 - 47:48
    devastating effects and the people
    who live in the Amazon.
  • 53:58 - 39:59
    Go
  • 53:58 - 54:01
    trying to discover how badly affected
    the local people are.
  • 54:00 - 44:04
    is for me the most scary part about
    the future of the Amazon
  • 54:00 - 61:31
    come out of weather forecasting models
  • 54:01 - 43:43
    But scientists like
  • 54:11 - 58:54
    One place where the Hadley model
    is predicting increasing
  • 54:11 - 61:14
    to see which best explains the
    changes in temperature.
  • 54:12 - 63:04
    they run for much longer periods
    around own for hundreds of years
  • 54:14 - 62:15
    from the harvest was very bad
  • 54:15 - 47:09
    How can we possibly know
    what the future holds.
  • 54:16 - 60:37
    So what do you know she also.
  • 54:17 - 53:18
    to the health of the John.
  • 54:19 - 66:00
    There's been no rain for 3 years
  • 54:22 - 64:23
    of work well by,
  • 54:26 - 58:36
    Well,
  • 54:26 - 66:06
    why was that
  • 54:28 - 50:09
    and their scenario
  • 54:28 - 56:59
    at the Hadley Centre,
  • 54:29 - 61:09
    younger.
  • 54:35 - 55:16
    and then we get to a period
  • 54:38 - 56:29
    Yeah,
  • 54:44 - 48:38
    that eventually produced Greece
    so immense that they're visible
  • 54:44 - 56:54
    Algeria,
  • 54:48 - 43:11
    which are the key organisms
    in these ecosystems
  • 54:50 - 63:20
    The model
  • 54:54 - 49:15
    several hundred
  • 54:56 - 52:47
    is the next year
  • 54:57 - 55:18
    you could reasonably argue
  • 54:58 - 57:38
    group.
  • 54:59 - 46:30
    absolutely
  • 55:00 - 56:13
    It's impossible to put any particular
    climatic or weather event
  • 55:02 - 51:14
    said it really stressed out rescue
  • 55:03 - 48:24
    next had
  • 55:04 - 63:54
    if the dying
  • 55:06 - 58:17
    will consider that call you.
  • 55:13 - 52:15
    Europe.
  • 55:21 - 52:32
    one,
  • 55:22 - 54:54
    passing astronaut came this way,
  • 55:33 - 49:56
    This super computer can perform 10 billion
  • 55:39 - 46:33
    Warming sea temperatures are already
    putting the oceans and the
  • 55:41 - 59:55
    is how can we distinguish between
    variations due to natural causes
  • 55:45 - 59:36
    you have a lot of that this is
  • 55:47 - 59:18
    There seems little doubt
  • 55:49 - 48:11
    When I come here and see this
  • 55:49 - 61:51
    And it's not just the non-human.
  • 55:56 - 56:48
    calculations per second
  • 55:56 - 66:56
    but dust storms
  • 55:58 - 52:41
    and I called customer funds
    that you rather frightening
  • 55:58 - 57:59
    That's something that is a,
  • 56:02 - 57:33
    we get this recent
  • 56:10 - 53:03
    have found that the reefs a far more
    sensitive to see temperatures
  • 56:10 - 66:42
    model and to put in the various factors,
  • 56:12 - 50:05
    is that this reaching is
    becoming more frequent
  • 56:12 - 65:02
    it throws up
  • 56:15 - 51:56
    Now,
  • 56:15 - 59:17
    there's been a marked decline in Maine.
  • 56:16 - 60:36
    dealings.
  • 56:24 - 60:05
    When the winds pick up
  • 56:26 - 45:38
    to discover how stressed
  • 56:29 - 65:21
    there wasn't so much sand here before.
  • 56:32 - 61:02
    from
  • 56:39 - 64:09
    If you go,
  • 56:41 - 51:02
    scientist
  • 56:44 - 71:05
    recently well this mid-century warming so
  • 56:47 - 55:49
    will be under threat.
  • 56:47 - 60:09
    like the one of summer 2003
  • 56:47 - 49:39
    province in northern China.
  • 56:47 - 61:09
    if there is takes a lot of time
    so it affects my work.
  • 56:49 - 71:29
    as well as reproducing.
  • 56:54 - 61:35
    who left in these corals
  • 56:54 - 56:55
    Professor Peter Cox
  • 56:55 - 52:47
    million years ago,
  • 56:55 - 57:08
    If you get to the latter part of
    20th century from about 1970
  • 56:59 - 68:00
    believe that they have put.
  • 57:04 - 66:47
    the complexity and beauty of our planet.
  • 57:12 - 58:53
    for troops being on recently
  • 57:15 - 57:18
    But what you can do is say that climate
    change affects the chance
  • 57:18 - 56:49
    of an event occurring
  • 57:18 - 68:08
    beyond our.
  • 57:20 - 60:52
    a warming of the climate
    and global warming,
  • 57:21 - 56:12
    movement
  • 57:25 - 46:37
    Some species that live in them
  • 57:25 - 57:07
    is working for the Chinese government
  • 57:28 - 52:30
    I examined it for myself.
  • 57:29 - 60:20
    we can't buy anything
  • 57:32 - 56:55
    and Clark models have to contain
    slower components like how the
  • 57:37 - 55:58
    is a case in point.
  • 57:39 - 59:09
    not
  • 57:41 - 60:01
    Anelka
  • 57:44 - 59:36
    is the cause of the changes we're seeing
  • 57:46 - 64:57
    where the desert is expanding.
  • 57:48 - 59:00
    the state of the car on the Barrier Reef
  • 57:49 - 65:30
    True variability.
  • 57:52 - 52:05
    securities would you might they
    want to improve their lives.
  • 57:56 - 54:57
    up to this point,
  • 57:59 - 59:20
    a rare event now
  • 58:07 - 67:08
    until that can you remember when you were
  • 58:11 - 52:15
    but I think I said it really
    quite like this before.
  • 58:12 - 58:14
    But at the time I was making the series
  • 58:13 - 66:24
    It's the biggest challenge
  • 58:14 - 55:15
    But they can do
  • 58:16 - 56:28
    and those variations of the climate
  • 58:19 - 54:00
    Adobe proudly
  • 58:21 - 65:41
    Chi white.
  • 58:28 - 56:31
    our whole way of life is structured
    around the Burmese
  • 58:30 - 53:03
    that there are a huge changes on
    the way with climate change
  • 58:31 - 63:31
    warming
  • 58:31 - 68:12
    We ourselves have become
  • 58:36 - 58:48
    I can say it isn't blitz Carl's
  • 58:42 - 47:44
    okay I'm here,
  • 58:46 - 59:56
    Of
  • 58:46 - 55:38
    has not had a harvest for 3 years.
  • 58:48 - 61:09
    it's another reminder
  • 58:49 - 58:31
    What we're gonna do is to
    take a walk through time
  • 59:00 - 58:53
    Such storms are already afflicting
    cities like Beijing
  • 59:03 - 61:24
    they getting more frequent
  • 59:06 - 64:17
    humans are was that natural.
  • 59:07 - 66:19
    occasionally there's a downward trend
    that's associated a volcano
  • 59:25 - 61:56
    But it's become more serious.
  • 59:25 - 64:16
    convinced me it anyway
  • 59:29 - 59:21
    rainfall patterns they contain winds
  • 59:33 - 58:25
    mostly from carbon dioxide
    that comes to fossil
  • 59:37 - 63:10
    and our carbon dioxide emissions
    into their model
  • 59:43 - 57:44
    but that
  • 59:43 - 53:34
    activity
  • 59:45 - 57:38
    vegetation on the soil respond
    to changing how the oceans
  • 59:48 - 47:29
    Away.
  • 59:48 - 54:19
    rifle.
  • 59:48 - 65:28
    onwards.
  • 59:49 - 51:51
    What is particularly unsettling
  • 59:50 - 63:01
    He observed temperatures
  • 60:07 - 45:49
    In recent years.
  • 60:07 - 72:38
    All those years ago.
  • 60:08 - 56:49
    models that essentially
  • 60:09 - 59:50
    you can see the red curve.
  • 60:17 - 56:59
    If you look at the green line of now.
  • 60:25 - 65:17
    now explain to us the significance
  • 60:28 - 61:11
    that we can't find the answer
    to some of the big questions.
  • 60:32 - 61:13
    climate scientists
  • 60:36 - 63:07
    since the 19-7.
  • 60:37 - 53:39
    I remember when I was a child.
  • 60:37 - 68:07
    something
  • 60:47 - 55:29
    and I've been terrorized by combination
  • 60:47 - 54:08
    that they will occur.
  • 60:48 - 68:20
    looks realistic looks like the real
    world and the second thing,
  • 60:52 - 63:53
    if you like,
  • 60:56 - 59:18
    and then we get this yellow
    card and we can see
  • 60:57 - 62:48
    In soup will drink
  • 61:00 - 68:50
    rises
  • 61:01 - 62:42
    of fossil fuels.
  • 61:02 - 61:03
    account gets into my house.
  • 61:03 - 57:04
    can we expect
  • 61:04 - 53:26
    Not good news for a land
  • 61:07 - 61:58
    the sand covered everything
  • 61:09 - 67:19
    You know what.
  • 61:14 - 54:48
    It's here at the Met Office's
    Hadley Centre in Exeter
  • 61:14 - 54:55
    temperatures
  • 61:14 - 55:27
    Over the last 120 years.
  • 61:15 - 55:47
    So there you have it.
  • 61:19 - 59:43
    despite so much evidence some people
    refused to believe that human
  • 61:21 - 72:11
    was built
  • 61:23 - 57:15
    down to climate change alone.
  • 61:24 - 51:26
    heatwaves more often.
  • 61:29 - 66:11
    environment was really good.
  • 61:32 - 64:03
    For instance,
  • 61:33 - 63:14
    the key thing
  • 61:37 - 54:08
    there's been a
  • 61:38 - 62:21
    again we include human factors particularly
    include greenhouse
  • 61:43 - 55:55
    Some of our richest environment.
  • 61:44 - 56:15
    this village
  • 61:51 - 54:15
    We as a species will not be immune either.
  • 61:52 - 66:24
    really begin to diverge.
  • 61:53 - 56:15
    Over the last 20 years,
  • 61:56 - 60:57
    In recent years.
  • 62:08 - 50:19
    change.
  • 62:18 - 52:31
    a lot of people have left
    the village already.
  • 62:21 - 67:51
    effect
  • 62:32 - 57:33
    to keep out
  • 62:35 - 60:28
    moved to a better place with water
    and much better conditions
  • 62:37 - 53:18
    climate
  • 62:39 - 59:52
    Those who are left behind like one lane
  • 62:39 - 66:39
    Georgia.
  • 62:43 - 56:55
    we can see that's no longer true.
  • 62:51 - 60:32
    and you can see that the
  • 62:57 - 55:58
    But they require
  • 62:57 - 56:09
    So this is when volcanoes go off
  • 62:58 - 64:31
    and by 20-40 because of
    future climate change,
  • 63:01 - 65:22
    and the first thing to note,
  • 63:01 - 58:23
    the steep rise in temperature
  • 63:05 - 66:05
    ego
  • 63:07 - 67:07
    But the
  • 63:08 - 61:01
    Powerful winds have driven
    the thin soil into dues
  • 63:15 - 56:27
    his calculate the likelihood
  • 63:16 - 62:57
    around about 1910
  • 63:24 - 57:55
    what caused that
  • 63:34 - 73:26
    recognized it was a force of nature
  • 63:37 - 66:59
    we most certainly have to do so,
  • 63:38 - 54:39
    And yet
  • 63:53 - 58:54
    and the issue is
  • 63:58 - 64:39
    that this recent
  • 63:59 - 55:11
    and the output from the sun
  • 64:03 - 48:07
    one of the chances of are having
    another major heatwave
  • 64:09 - 58:52
    if you go you know and I get home
    if I don't brush I sand away
  • 64:13 - 56:54
    went dry
  • 64:15 - 60:37
    it can give us the probability
  • 64:17 - 70:59
    So what we do to try and work that
    one hours to take a climate
  • 64:23 - 64:15
    almost the norm by 20-80
  • 64:23 - 56:16
    we can only depend on the food
    given by the government
  • 64:25 - 62:57
    that includes just these natural factors.
  • 64:31 - 55:53
    it will become a one in 2 year event
  • 64:43 - 69:13
    like
  • 64:46 - 56:47
    Then if you,
  • 64:51 - 52:33
    as the planet warms up
  • 64:58 - 60:30
    this one that we marked out on the floor
  • 65:02 - 55:33
    And
  • 65:08 - 71:01
    climate variation can be explained
    by natural factors,
  • 65:11 - 67:53
    that without the action of human beings,
  • 65:21 - 52:02
    Okay.
  • 65:22 - 66:05
    as we walk through its a bit the
    climate is naturally variable.
  • 65:28 - 70:08
    Here
  • 65:30 - 59:41
    It's clear
  • 65:32 - 68:53
    curve can reproduce
  • 65:43 - 56:15
    blinkered here is a car model
  • 66:05 - 69:46
    It's a spiky based
  • 66:11 - 51:23
    And in 1973
  • 66:13 - 68:04
    Professor Lin that
  • 66:18 - 65:02
    that are induced by human activity.
  • 66:19 - 56:12
    going off the coast of system
    down because of the dust,
  • 66:20 - 63:41
    to global warming
  • 66:22 - 72:05
    And we have the capacity to adapt
    and modify our behavior
  • 66:24 - 67:57
    And the question again is what
    caused this recent woman.
  • 66:25 - 66:26
    the dry soil
  • 66:30 - 69:53
    that while I've been traveling
    the world trying to record
  • 66:42 - 62:03
    what we can say with its
  • 66:47 - 60:10
    The night to have been making
    my own contribution
  • 66:54 - 66:55
    the grass struck growing
  • 66:54 - 55:27
    both natural climate variations
  • 66:59 - 58:13
    if we are to deal with climate change.
  • 67:01 - 57:12
    in the green
  • 67:05 - 58:28
    We are all involved in this,
  • 67:14 - 70:04
    that
  • 67:19 - 59:41
    At the same situation to do
  • 67:21 - 64:34
    and when I was a child who it was
    also sometimes very trying
  • 67:25 - 55:46
    was that
  • 67:43 - 60:15
    rather rapid warming reproduced
  • 67:44 - 56:57
    continues this will only get worse.
  • 67:46 - 68:57
    and without crops.
  • 67:49 - 63:11
    that aren't swamped by sand
  • 67:50 - 55:02
    that have been prepared from
  • 67:53 - 56:46
    they would have been far
    less temperature change
  • 67:57 - 61:38
    So we run the model,
  • 68:06 - 58:07
    You know,
  • 68:07 - 60:09
    where you can start to see an upward trend
  • 68:09 - 65:30
    sea wall
  • 68:20 - 66:51
    the model tells us
  • 68:28 - 58:50
    The key question of course
  • 68:34 - 59:25
    IVF.
  • 68:50 - 58:02
    and we have no money to spend.
  • 68:50 - 64:03
    The bleak realities of climate change
  • 68:52 - 64:03
    the general it just
  • 68:57 - 65:38
    We have no income
  • 68:57 - 61:18
    of this squad.
  • 69:03 - 62:25
    are being felt all over the world.
  • 69:03 - 60:04
    what he
  • 69:06 - 67:17
    the climate models
  • 69:08 - 67:09
    I find it sobering
  • 69:13 - 60:34
    They sat
  • 69:13 - 66:45
    is due to human activity.
  • 69:23 - 65:34
    isolates around
  • 69:46 - 58:37
    now
  • 70:06 - 58:48
    was a graph like
  • 70:38 - 58:49
    Okay.
  • 70:41 - 71:43
    but this recent morning
    is due to human beings.
  • 70:43 - 60:07
    as I recognized when I presented
    life on Earth.
  • 71:01 - 62:43
    but as we move on,
  • 71:05 - 71:06
    and that tells us 2 things,
  • 71:06 - 68:37
    one is that the model
  • 71:29 - 65:50
    The mid-century
  • 71:52 - 72:13
    a force of nature.
  • 72:38 - 58:32
    We are a flexible and innovative species.
  • 72:59 - 62:40
    to think
  • 73:08 - 62:19
    This
  • 73:34 - 59:46
    we have yet faced.
Title:
David Attenborough: The Truth About Climate Change (BBC - Part 1)
Description:

more » « less
Video Language:
English
Team:
Environment
Project:
Climate Change
Duration:
01:00:00

Danish subtitles

Revisions