0:00:01.950,0:00:05.240
Why is 1.5[br]degrees such a big deal?

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Because to warm our entire[br]planet up by 1.5 degrees Celsius

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requires a lot of heat.

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All this extra heat melts[br]glaciers, which raise sea levels.

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If the ice sheets of Antarctica

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and Greenland melt completely,

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millions of people's[br]homes will be underwater.

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The extra heat also intensifies weather,

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making wet places[br]wetter, dry places drier,

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and increasing the ferocity of storms.

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That 1.5-degree increase also[br]won't be distributed evenly.

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The coldest nights in the Arctic

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might get 10 degrees warmer.

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The warmest days in Mumbai[br]might get five degrees hotter.

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Over the past 10,000[br]years, we've been lucky.

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Earth's climate was stable and[br]our civilizations flourished.

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But as our climate gets more unstable,

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so will our economies and our societies.

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We'll all suffer and the[br]vulnerable will be hit hardest

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unless we act now.