1 00:00:01,000 --> 00:00:05,000 I'm going to talk today about energy and climate. 2 00:00:05,000 --> 00:00:07,000 And that might seem a bit surprising because 3 00:00:07,000 --> 00:00:12,000 my full-time work at the Foundation is mostly about vaccines and seeds, 4 00:00:12,000 --> 00:00:15,000 about the things that we need to invent and deliver 5 00:00:15,000 --> 00:00:20,000 to help the poorest two billion live better lives. 6 00:00:20,000 --> 00:00:25,000 But energy and climate are extremely important to these people -- 7 00:00:25,000 --> 00:00:30,000 in fact, more important than to anyone else on the planet. 8 00:00:30,000 --> 00:00:35,000 The climate getting worse means that many years, their crops won't grow: 9 00:00:35,000 --> 00:00:38,000 There will be too much rain, not enough rain, 10 00:00:38,000 --> 00:00:40,000 things will change in ways 11 00:00:40,000 --> 00:00:44,000 that their fragile environment simply can't support. 12 00:00:44,000 --> 00:00:49,000 And that leads to starvation, it leads to uncertainty, it leads to unrest. 13 00:00:49,000 --> 00:00:53,000 So, the climate changes will be terrible for them. 14 00:00:53,000 --> 00:00:56,000 Also, the price of energy is very important to them. 15 00:00:56,000 --> 00:00:59,000 In fact, if you could pick just one thing to lower the price of, 16 00:00:59,000 --> 00:01:03,000 to reduce poverty, by far you would pick energy. 17 00:01:03,000 --> 00:01:07,000 Now, the price of energy has come down over time. 18 00:01:07,000 --> 00:01:13,000 Really advanced civilization is based on advances in energy. 19 00:01:13,000 --> 00:01:17,000 The coal revolution fueled the Industrial Revolution, 20 00:01:17,000 --> 00:01:23,000 and, even in the 1900s we've seen a very rapid decline in the price of electricity, 21 00:01:23,000 --> 00:01:26,000 and that's why we have refrigerators, air-conditioning, 22 00:01:26,000 --> 00:01:30,000 we can make modern materials and do so many things. 23 00:01:30,000 --> 00:01:37,000 And so, we're in a wonderful situation with electricity in the rich world. 24 00:01:37,000 --> 00:01:44,000 But, as we make it cheaper -- and let's go for making it twice as cheap -- 25 00:01:44,000 --> 00:01:46,000 we need to meet a new constraint, 26 00:01:46,000 --> 00:01:50,000 and that constraint has to do with CO2. 27 00:01:50,000 --> 00:01:53,000 CO2 is warming the planet, 28 00:01:53,000 --> 00:01:59,000 and the equation on CO2 is actually a very straightforward one. 29 00:01:59,000 --> 00:02:03,000 If you sum up the CO2 that gets emitted, 30 00:02:03,000 --> 00:02:06,000 that leads to a temperature increase, 31 00:02:06,000 --> 00:02:10,000 and that temperature increase leads to some very negative effects: 32 00:02:10,000 --> 00:02:13,000 the effects on the weather; perhaps worse, the indirect effects, 33 00:02:13,000 --> 00:02:18,000 in that the natural ecosystems can't adjust to these rapid changes, 34 00:02:18,000 --> 00:02:21,000 and so you get ecosystem collapses. 35 00:02:21,000 --> 00:02:24,000 Now, the exact amount of how you map 36 00:02:24,000 --> 00:02:28,000 from a certain increase of CO2 to what temperature will be 37 00:02:28,000 --> 00:02:30,000 and where the positive feedbacks are, 38 00:02:30,000 --> 00:02:33,000 there's some uncertainty there, but not very much. 39 00:02:33,000 --> 00:02:36,000 And there's certainly uncertainty about how bad those effects will be, 40 00:02:36,000 --> 00:02:39,000 but they will be extremely bad. 41 00:02:39,000 --> 00:02:41,000 I asked the top scientists on this several times: 42 00:02:41,000 --> 00:02:44,000 Do we really have to get down to near zero? 43 00:02:44,000 --> 00:02:47,000 Can't we just cut it in half or a quarter? 44 00:02:47,000 --> 00:02:51,000 And the answer is that until we get near to zero, 45 00:02:51,000 --> 00:02:53,000 the temperature will continue to rise. 46 00:02:53,000 --> 00:02:55,000 And so that's a big challenge. 47 00:02:55,000 --> 00:03:00,000 It's very different than saying "We're a twelve-foot-high truck trying to get under a ten-foot bridge, 48 00:03:00,000 --> 00:03:03,000 and we can just sort of squeeze under." 49 00:03:03,000 --> 00:03:07,000 This is something that has to get to zero. 50 00:03:07,000 --> 00:03:11,000 Now, we put out a lot of carbon dioxide every year, 51 00:03:11,000 --> 00:03:13,000 over 26 billion tons. 52 00:03:13,000 --> 00:03:17,000 For each American, it's about 20 tons; 53 00:03:17,000 --> 00:03:20,000 for people in poor countries, it's less than one ton. 54 00:03:20,000 --> 00:03:24,000 It's an average of about five tons for everyone on the planet. 55 00:03:24,000 --> 00:03:26,000 And, somehow, we have to make changes 56 00:03:26,000 --> 00:03:29,000 that will bring that down to zero. 57 00:03:29,000 --> 00:03:31,000 It's been constantly going up. 58 00:03:31,000 --> 00:03:36,000 It's only various economic changes that have even flattened it at all, 59 00:03:36,000 --> 00:03:39,000 so we have to go from rapidly rising 60 00:03:39,000 --> 00:03:42,000 to falling, and falling all the way to zero. 61 00:03:42,000 --> 00:03:44,000 This equation has four factors, 62 00:03:44,000 --> 00:03:46,000 a little bit of multiplication: 63 00:03:46,000 --> 00:03:49,000 So, you've got a thing on the left, CO2, that you want to get to zero, 64 00:03:49,000 --> 00:03:53,000 and that's going to be based on the number of people, 65 00:03:53,000 --> 00:03:56,000 the services each person's using on average, 66 00:03:56,000 --> 00:03:59,000 the energy on average for each service, 67 00:03:59,000 --> 00:04:03,000 and the CO2 being put out per unit of energy. 68 00:04:03,000 --> 00:04:05,000 So, let's look at each one of these 69 00:04:05,000 --> 00:04:09,000 and see how we can get this down to zero. 70 00:04:09,000 --> 00:04:13,000 Probably, one of these numbers is going to have to get pretty near to zero. 71 00:04:13,000 --> 00:04:16,000 Now that's back from high school algebra, 72 00:04:16,000 --> 00:04:18,000 but let's take a look. 73 00:04:18,000 --> 00:04:20,000 First, we've got population. 74 00:04:20,000 --> 00:04:23,000 The world today has 6.8 billion people. 75 00:04:23,000 --> 00:04:25,000 That's headed up to about nine billion. 76 00:04:25,000 --> 00:04:29,000 Now, if we do a really great job on new vaccines, 77 00:04:29,000 --> 00:04:31,000 health care, reproductive health services, 78 00:04:31,000 --> 00:04:35,000 we could lower that by, perhaps, 10 or 15 percent, 79 00:04:35,000 --> 00:04:39,000 but there we see an increase of about 1.3. 80 00:04:39,000 --> 00:04:42,000 The second factor is the services we use. 81 00:04:42,000 --> 00:04:44,000 This encompasses everything: 82 00:04:44,000 --> 00:04:48,000 the food we eat, clothing, TV, heating. 83 00:04:48,000 --> 00:04:51,000 These are very good things: 84 00:04:51,000 --> 00:04:54,000 getting rid of poverty means providing these services 85 00:04:54,000 --> 00:04:56,000 to almost everyone on the planet. 86 00:04:56,000 --> 00:05:00,000 And it's a great thing for this number to go up. 87 00:05:00,000 --> 00:05:02,000 In the rich world, perhaps the top one billion, 88 00:05:02,000 --> 00:05:04,000 we probably could cut back and use less, 89 00:05:04,000 --> 00:05:08,000 but every year, this number, on average, is going to go up, 90 00:05:08,000 --> 00:05:12,000 and so, over all, that will more than double 91 00:05:12,000 --> 00:05:15,000 the services delivered per person. 92 00:05:15,000 --> 00:05:17,000 Here we have a very basic service: 93 00:05:17,000 --> 00:05:20,000 Do you have lighting in your house to be able to read your homework? 94 00:05:20,000 --> 00:05:22,000 And, in fact, these kids don't, so they're going out 95 00:05:22,000 --> 00:05:26,000 and reading their school work under the street lamps. 96 00:05:27,000 --> 00:05:31,000 Now, efficiency, E, the energy for each service, 97 00:05:31,000 --> 00:05:33,000 here finally we have some good news. 98 00:05:33,000 --> 00:05:35,000 We have something that's not going up. 99 00:05:35,000 --> 00:05:38,000 Through various inventions and new ways of doing lighting, 100 00:05:38,000 --> 00:05:43,000 through different types of cars, different ways of building buildings -- 101 00:05:43,000 --> 00:05:46,000 there are a lot of services where you can bring 102 00:05:46,000 --> 00:05:50,000 the energy for that service down quite substantially. 103 00:05:50,000 --> 00:05:53,000 Some individual services even bring it down by 90 percent. 104 00:05:53,000 --> 00:05:56,000 There are other services like how we make fertilizer, 105 00:05:56,000 --> 00:05:58,000 or how we do air transport, 106 00:05:58,000 --> 00:06:02,000 where the rooms for improvement are far, far less. 107 00:06:02,000 --> 00:06:04,000 And so, overall here, if we're optimistic, 108 00:06:04,000 --> 00:06:11,000 we may get a reduction of a factor of three to even, perhaps, a factor of six. 109 00:06:11,000 --> 00:06:14,000 But for these first three factors now, 110 00:06:14,000 --> 00:06:19,000 we've gone from 26 billion to, at best, maybe 13 billion tons, 111 00:06:19,000 --> 00:06:21,000 and that just won't cut it. 112 00:06:21,000 --> 00:06:23,000 So let's look at this fourth factor -- 113 00:06:23,000 --> 00:06:25,000 this is going to be a key one -- 114 00:06:25,000 --> 00:06:31,000 and this is the amount of CO2 put out per each unit of energy. 115 00:06:31,000 --> 00:06:35,000 And so the question is: Can you actually get that to zero? 116 00:06:35,000 --> 00:06:37,000 If you burn coal, no. 117 00:06:37,000 --> 00:06:39,000 If you burn natural gas, no. 118 00:06:39,000 --> 00:06:42,000 Almost every way we make electricity today, 119 00:06:42,000 --> 00:06:48,000 except for the emerging renewables and nuclear, puts out CO2. 120 00:06:48,000 --> 00:06:51,000 And so, what we're going to have to do at a global scale, 121 00:06:51,000 --> 00:06:54,000 is create a new system. 122 00:06:54,000 --> 00:06:56,000 And so, we need energy miracles. 123 00:06:56,000 --> 00:07:00,000 Now, when I use the term "miracle," I don't mean something that's impossible. 124 00:07:00,000 --> 00:07:05,000 The microprocessor is a miracle. The personal computer is a miracle. 125 00:07:05,000 --> 00:07:08,000 The Internet and its services are a miracle. 126 00:07:08,000 --> 00:07:13,000 So, the people here have participated in the creation of many miracles. 127 00:07:13,000 --> 00:07:15,000 Usually, we don't have a deadline, 128 00:07:15,000 --> 00:07:17,000 where you have to get the miracle by a certain date. 129 00:07:17,000 --> 00:07:21,000 Usually, you just kind of stand by, and some come along, some don't. 130 00:07:21,000 --> 00:07:25,000 This is a case where we actually have to drive at full speed 131 00:07:25,000 --> 00:07:30,000 and get a miracle in a pretty tight timeline. 132 00:07:30,000 --> 00:07:33,000 Now, I thought, "How could I really capture this? 133 00:07:33,000 --> 00:07:35,000 Is there some kind of natural illustration, 134 00:07:35,000 --> 00:07:40,000 some demonstration that would grab people's imagination here?" 135 00:07:40,000 --> 00:07:44,000 I thought back to a year ago when I brought mosquitos, 136 00:07:44,000 --> 00:07:46,000 and somehow people enjoyed that. 137 00:07:46,000 --> 00:07:48,000 (Laughter) 138 00:07:48,000 --> 00:07:51,000 It really got them involved in the idea of, 139 00:07:51,000 --> 00:07:54,000 you know, there are people who live with mosquitos. 140 00:07:54,000 --> 00:07:59,000 So, with energy, all I could come up with is this. 141 00:07:59,000 --> 00:08:02,000 I decided that releasing fireflies 142 00:08:02,000 --> 00:08:06,000 would be my contribution to the environment here this year. 143 00:08:06,000 --> 00:08:09,000 So here we have some natural fireflies. 144 00:08:09,000 --> 00:08:12,000 I'm told they don't bite; in fact, they might not even leave that jar. 145 00:08:12,000 --> 00:08:15,000 (Laughter) 146 00:08:15,000 --> 00:08:20,000 Now, there's all sorts of gimmicky solutions like that one, 147 00:08:20,000 --> 00:08:22,000 but they don't really add up to much. 148 00:08:22,000 --> 00:08:26,000 We need solutions -- either one or several -- 149 00:08:26,000 --> 00:08:30,000 that have unbelievable scale 150 00:08:30,000 --> 00:08:32,000 and unbelievable reliability, 151 00:08:32,000 --> 00:08:35,000 and, although there's many directions people are seeking, 152 00:08:35,000 --> 00:08:39,000 I really only see five that can achieve the big numbers. 153 00:08:39,000 --> 00:08:44,000 I've left out tide, geothermal, fusion, biofuels. 154 00:08:44,000 --> 00:08:46,000 Those may make some contribution, 155 00:08:46,000 --> 00:08:48,000 and if they can do better than I expect, so much the better, 156 00:08:48,000 --> 00:08:50,000 but my key point here 157 00:08:50,000 --> 00:08:54,000 is that we're going to have to work on each of these five, 158 00:08:54,000 --> 00:08:58,000 and we can't give up any of them because they look daunting, 159 00:08:58,000 --> 00:09:02,000 because they all have significant challenges. 160 00:09:02,000 --> 00:09:04,000 Let's look first at the burning fossil fuels, 161 00:09:04,000 --> 00:09:08,000 either burning coal or burning natural gas. 162 00:09:08,000 --> 00:09:11,000 What you need to do there, seems like it might be simple, but it's not, 163 00:09:11,000 --> 00:09:17,000 and that's to take all the CO2, after you've burned it, going out the flue, 164 00:09:17,000 --> 00:09:20,000 pressurize it, create a liquid, put it somewhere, 165 00:09:20,000 --> 00:09:22,000 and hope it stays there. 166 00:09:22,000 --> 00:09:26,000 Now we have some pilot things that do this at the 60 to 80 percent level, 167 00:09:26,000 --> 00:09:30,000 but getting up to that full percentage, that will be very tricky, 168 00:09:30,000 --> 00:09:36,000 and agreeing on where these CO2 quantities should be put will be hard, 169 00:09:36,000 --> 00:09:39,000 but the toughest one here is this long-term issue. 170 00:09:39,000 --> 00:09:41,000 Who's going to be sure? 171 00:09:41,000 --> 00:09:45,000 Who's going to guarantee something that is literally billions of times larger 172 00:09:45,000 --> 00:09:49,000 than any type of waste you think of in terms of nuclear or other things? 173 00:09:49,000 --> 00:09:52,000 This is a lot of volume. 174 00:09:52,000 --> 00:09:54,000 So that's a tough one. 175 00:09:54,000 --> 00:09:56,000 Next would be nuclear. 176 00:09:56,000 --> 00:09:59,000 It also has three big problems: 177 00:09:59,000 --> 00:10:03,000 Cost, particularly in highly regulated countries, is high; 178 00:10:03,000 --> 00:10:07,000 the issue of the safety, really feeling good about nothing could go wrong, 179 00:10:07,000 --> 00:10:10,000 that, even though you have these human operators, 180 00:10:10,000 --> 00:10:13,000 that the fuel doesn't get used for weapons. 181 00:10:13,000 --> 00:10:15,000 And then what do you do with the waste? 182 00:10:15,000 --> 00:10:18,000 And, although it's not very large, there are a lot of concerns about that. 183 00:10:18,000 --> 00:10:20,000 People need to feel good about it. 184 00:10:20,000 --> 00:10:25,000 So three very tough problems that might be solvable, 185 00:10:25,000 --> 00:10:27,000 and so, should be worked on. 186 00:10:27,000 --> 00:10:30,000 The last three of the five, I've grouped together. 187 00:10:30,000 --> 00:10:34,000 These are what people often refer to as the renewable sources. 188 00:10:34,000 --> 00:10:38,000 And they actually -- although it's great they don't require fuel -- 189 00:10:38,000 --> 00:10:40,000 they have some disadvantages. 190 00:10:40,000 --> 00:10:46,000 One is that the density of energy gathered in these technologies 191 00:10:46,000 --> 00:10:48,000 is dramatically less than a power plant. 192 00:10:48,000 --> 00:10:52,000 This is energy farming, so you're talking about many square miles, 193 00:10:52,000 --> 00:10:57,000 thousands of time more area than you think of as a normal energy plant. 194 00:10:57,000 --> 00:11:00,000 Also, these are intermittent sources. 195 00:11:00,000 --> 00:11:03,000 The sun doesn't shine all day, it doesn't shine every day, 196 00:11:03,000 --> 00:11:06,000 and, likewise, the wind doesn't blow all the time. 197 00:11:06,000 --> 00:11:08,000 And so, if you depend on these sources, 198 00:11:08,000 --> 00:11:11,000 you have to have some way of getting the energy 199 00:11:11,000 --> 00:11:14,000 during those time periods that it's not available. 200 00:11:14,000 --> 00:11:17,000 So, we've got big cost challenges here, 201 00:11:17,000 --> 00:11:19,000 we have transmission challenges: 202 00:11:19,000 --> 00:11:22,000 for example, say this energy source is outside your country; 203 00:11:22,000 --> 00:11:24,000 you not only need the technology, 204 00:11:24,000 --> 00:11:29,000 but you have to deal with the risk of the energy coming from elsewhere. 205 00:11:29,000 --> 00:11:31,000 And, finally, this storage problem. 206 00:11:31,000 --> 00:11:34,000 And, to dimensionalize this, I went through and looked at 207 00:11:34,000 --> 00:11:37,000 all the types of batteries that get made -- 208 00:11:37,000 --> 00:11:41,000 for cars, for computers, for phones, for flashlights, for everything -- 209 00:11:41,000 --> 00:11:46,000 and compared that to the amount of electrical energy the world uses, 210 00:11:46,000 --> 00:11:50,000 and what I found is that all the batteries we make now 211 00:11:50,000 --> 00:11:54,000 could store less than 10 minutes of all the energy. 212 00:11:54,000 --> 00:11:57,000 And so, in fact, we need a big breakthrough here, 213 00:11:57,000 --> 00:12:01,000 something that's going to be a factor of 100 better 214 00:12:01,000 --> 00:12:03,000 than the approaches we have now. 215 00:12:03,000 --> 00:12:07,000 It's not impossible, but it's not a very easy thing. 216 00:12:07,000 --> 00:12:11,000 Now, this shows up when you try to get the intermittent source 217 00:12:11,000 --> 00:12:15,000 to be above, say, 20 to 30 percent of what you're using. 218 00:12:15,000 --> 00:12:17,000 If you're counting on it for 100 percent, 219 00:12:17,000 --> 00:12:22,000 you need an incredible miracle battery. 220 00:12:23,000 --> 00:12:26,000 Now, how we're going to go forward on this -- what's the right approach? 221 00:12:26,000 --> 00:12:30,000 Is it a Manhattan Project? What's the thing that can get us there? 222 00:12:30,000 --> 00:12:35,000 Well, we need lots of companies working on this, hundreds. 223 00:12:35,000 --> 00:12:38,000 In each of these five paths, we need at least a hundred people. 224 00:12:38,000 --> 00:12:42,000 And a lot of them, you'll look at and say, "They're crazy." That's good. 225 00:12:42,000 --> 00:12:45,000 And, I think, here in the TED group, 226 00:12:45,000 --> 00:12:49,000 we have many people who are already pursuing this. 227 00:12:49,000 --> 00:12:53,000 Bill Gross has several companies, including one called eSolar 228 00:12:53,000 --> 00:12:55,000 that has some great solar thermal technologies. 229 00:12:55,000 --> 00:12:59,000 Vinod Khosla's investing in dozens of companies 230 00:12:59,000 --> 00:13:03,000 that are doing great things and have interesting possibilities, 231 00:13:03,000 --> 00:13:05,000 and I'm trying to help back that. 232 00:13:05,000 --> 00:13:09,000 Nathan Myhrvold and I actually are backing a company 233 00:13:09,000 --> 00:13:13,000 that, perhaps surprisingly, is actually taking the nuclear approach. 234 00:13:13,000 --> 00:13:17,000 There are some innovations in nuclear: modular, liquid. 235 00:13:17,000 --> 00:13:21,000 And innovation really stopped in this industry quite some ago, 236 00:13:21,000 --> 00:13:26,000 so the idea that there's some good ideas laying around is not all that surprising. 237 00:13:26,000 --> 00:13:32,000 The idea of TerraPower is that, instead of burning a part of uranium -- 238 00:13:32,000 --> 00:13:35,000 the one percent, which is the U235 -- 239 00:13:35,000 --> 00:13:40,000 we decided, "Let's burn the 99 percent, the U238." 240 00:13:40,000 --> 00:13:42,000 It is kind of a crazy idea. 241 00:13:42,000 --> 00:13:45,000 In fact, people had talked about it for a long time, 242 00:13:45,000 --> 00:13:49,000 but they could never simulate properly whether it would work or not, 243 00:13:49,000 --> 00:13:52,000 and so it's through the advent of modern supercomputers 244 00:13:52,000 --> 00:13:54,000 that now you can simulate and see that, yes, 245 00:13:54,000 --> 00:14:00,000 with the right material's approach, this looks like it would work. 246 00:14:00,000 --> 00:14:03,000 And, because you're burning that 99 percent, 247 00:14:03,000 --> 00:14:07,000 you have greatly improved cost profile. 248 00:14:07,000 --> 00:14:11,000 You actually burn up the waste, and you can actually use as fuel 249 00:14:11,000 --> 00:14:14,000 all the leftover waste from today's reactors. 250 00:14:14,000 --> 00:14:19,000 So, instead of worrying about them, you just take that. It's a great thing. 251 00:14:19,000 --> 00:14:23,000 It breathes this uranium as it goes along, so it's kind of like a candle. 252 00:14:23,000 --> 00:14:27,000 You can see it's a log there, often referred to as a traveling wave reactor. 253 00:14:27,000 --> 00:14:31,000 In terms of fuel, this really solves the problem. 254 00:14:31,000 --> 00:14:34,000 I've got a picture here of a place in Kentucky. 255 00:14:34,000 --> 00:14:36,000 This is the leftover, the 99 percent, 256 00:14:36,000 --> 00:14:38,000 where they've taken out the part they burn now, 257 00:14:38,000 --> 00:14:40,000 so it's called depleted uranium. 258 00:14:40,000 --> 00:14:43,000 That would power the U.S. for hundreds of years. 259 00:14:43,000 --> 00:14:46,000 And, simply by filtering seawater in an inexpensive process, 260 00:14:46,000 --> 00:14:51,000 you'd have enough fuel for the entire lifetime of the rest of the planet. 261 00:14:51,000 --> 00:14:55,000 So, you know, it's got lots of challenges ahead, 262 00:14:55,000 --> 00:15:00,000 but it is an example of the many hundreds and hundreds of ideas 263 00:15:00,000 --> 00:15:03,000 that we need to move forward. 264 00:15:03,000 --> 00:15:06,000 So let's think: How should we measure ourselves? 265 00:15:06,000 --> 00:15:09,000 What should our report card look like? 266 00:15:09,000 --> 00:15:12,000 Well, let's go out to where we really need to get, 267 00:15:12,000 --> 00:15:14,000 and then look at the intermediate. 268 00:15:14,000 --> 00:15:19,000 For 2050, you've heard many people talk about this 80 percent reduction. 269 00:15:19,000 --> 00:15:23,000 That really is very important, that we get there. 270 00:15:23,000 --> 00:15:27,000 And that 20 percent will be used up by things going on in poor countries, 271 00:15:27,000 --> 00:15:29,000 still some agriculture, 272 00:15:29,000 --> 00:15:33,000 hopefully we will have cleaned up forestry, cement. 273 00:15:33,000 --> 00:15:36,000 So, to get to that 80 percent, 274 00:15:36,000 --> 00:15:40,000 the developed countries, including countries like China, 275 00:15:40,000 --> 00:15:45,000 will have had to switch their electricity generation altogether. 276 00:15:45,000 --> 00:15:51,000 So, the other grade is: Are we deploying this zero-emission technology, 277 00:15:51,000 --> 00:15:53,000 have we deployed it in all the developed countries 278 00:15:53,000 --> 00:15:56,000 and we're in the process of getting it elsewhere? 279 00:15:56,000 --> 00:15:58,000 That's super important. 280 00:15:58,000 --> 00:16:02,000 That's a key element of making that report card. 281 00:16:02,000 --> 00:16:07,000 So, backing up from there, what should the 2020 report card look like? 282 00:16:07,000 --> 00:16:09,000 Well, again, it should have the two elements. 283 00:16:09,000 --> 00:16:13,000 We should go through these efficiency measures to start getting reductions: 284 00:16:13,000 --> 00:16:16,000 The less we emit, the less that sum will be of CO2, 285 00:16:16,000 --> 00:16:18,000 and, therefore, the less the temperature. 286 00:16:18,000 --> 00:16:21,000 But in some ways, the grade we get there, 287 00:16:21,000 --> 00:16:25,000 doing things that don't get us all the way to the big reductions, 288 00:16:25,000 --> 00:16:29,000 is only equally, or maybe even slightly less, important than the other, 289 00:16:29,000 --> 00:16:33,000 which is the piece of innovation on these breakthroughs. 290 00:16:33,000 --> 00:16:36,000 These breakthroughs, we need to move those at full speed, 291 00:16:36,000 --> 00:16:39,000 and we can measure that in terms of companies, 292 00:16:39,000 --> 00:16:42,000 pilot projects, regulatory things that have been changed. 293 00:16:42,000 --> 00:16:45,000 There's a lot of great books that have been written about this. 294 00:16:45,000 --> 00:16:48,000 The Al Gore book, "Our Choice" 295 00:16:48,000 --> 00:16:51,000 and the David McKay book, "Sustainable Energy Without the Hot Air." 296 00:16:51,000 --> 00:16:54,000 They really go through it and create a framework 297 00:16:54,000 --> 00:16:56,000 that this can be discussed broadly, 298 00:16:56,000 --> 00:16:59,000 because we need broad backing for this. 299 00:16:59,000 --> 00:17:01,000 There's a lot that has to come together. 300 00:17:01,000 --> 00:17:03,000 So this is a wish. 301 00:17:03,000 --> 00:17:07,000 It's a very concrete wish that we invent this technology. 302 00:17:07,000 --> 00:17:10,000 If you gave me only one wish for the next 50 years -- 303 00:17:10,000 --> 00:17:12,000 I could pick who's president, 304 00:17:12,000 --> 00:17:15,000 I could pick a vaccine, which is something I love, 305 00:17:15,000 --> 00:17:17,000 or I could pick that this thing 306 00:17:17,000 --> 00:17:21,000 that's half the cost with no CO2 gets invented -- 307 00:17:21,000 --> 00:17:23,000 this is the wish I would pick. 308 00:17:23,000 --> 00:17:25,000 This is the one with the greatest impact. 309 00:17:25,000 --> 00:17:27,000 If we don't get this wish, 310 00:17:27,000 --> 00:17:31,000 the division between the people who think short term and long term will be terrible, 311 00:17:31,000 --> 00:17:34,000 between the U.S. and China, between poor countries and rich, 312 00:17:34,000 --> 00:17:39,000 and most of all the lives of those two billion will be far worse. 313 00:17:39,000 --> 00:17:41,000 So, what do we have to do? 314 00:17:41,000 --> 00:17:46,000 What am I appealing to you to step forward and drive? 315 00:17:46,000 --> 00:17:49,000 We need to go for more research funding. 316 00:17:49,000 --> 00:17:51,000 When countries get together in places like Copenhagen, 317 00:17:51,000 --> 00:17:54,000 they shouldn't just discuss the CO2. 318 00:17:54,000 --> 00:17:56,000 They should discuss this innovation agenda, 319 00:17:56,000 --> 00:18:01,000 and you'd be stunned at the ridiculously low levels of spending 320 00:18:01,000 --> 00:18:03,000 on these innovative approaches. 321 00:18:03,000 --> 00:18:07,000 We do need the market incentives -- CO2 tax, cap and trade -- 322 00:18:07,000 --> 00:18:10,000 something that gets that price signal out there. 323 00:18:10,000 --> 00:18:12,000 We need to get the message out. 324 00:18:12,000 --> 00:18:15,000 We need to have this dialogue be a more rational, more understandable dialogue, 325 00:18:15,000 --> 00:18:18,000 including the steps that the government takes. 326 00:18:18,000 --> 00:18:22,000 This is an important wish, but it is one I think we can achieve. 327 00:18:22,000 --> 00:18:24,000 Thank you. 328 00:18:24,000 --> 00:18:35,000 (Applause) 329 00:18:35,000 --> 00:18:37,000 Thank you. 330 00:18:37,000 --> 00:18:39,000 Chris Anderson: Thank you. Thank you. 331 00:18:39,000 --> 00:18:44,000 (Applause) 332 00:18:44,000 --> 00:18:50,000 Thank you. So to understand more about TerraPower, right -- 333 00:18:50,000 --> 00:18:55,000 I mean, first of all, can you give a sense of what scale of investment this is? 334 00:18:55,000 --> 00:18:59,000 Bil Gates: To actually do the software, buy the supercomputer, 335 00:18:59,000 --> 00:19:01,000 hire all the great scientists, which we've done, 336 00:19:01,000 --> 00:19:04,000 that's only tens of millions, 337 00:19:04,000 --> 00:19:07,000 and even once we test our materials out in a Russian reactor 338 00:19:07,000 --> 00:19:11,000 to make sure that our materials work properly, 339 00:19:11,000 --> 00:19:13,000 then you'll only be up in the hundreds of millions. 340 00:19:13,000 --> 00:19:16,000 The tough thing is building the pilot reactor; 341 00:19:16,000 --> 00:19:21,000 finding the several billion, finding the regulator, the location 342 00:19:21,000 --> 00:19:23,000 that will actually build the first one of these. 343 00:19:23,000 --> 00:19:27,000 Once you get the first one built, if it works as advertised, 344 00:19:27,000 --> 00:19:31,000 then it's just clear as day, because the economics, the energy density, 345 00:19:31,000 --> 00:19:33,000 are so different than nuclear as we know it. 346 00:19:33,000 --> 00:19:37,000 CA: And so, to understand it right, this involves building deep into the ground 347 00:19:37,000 --> 00:19:41,000 almost like a vertical kind of column of nuclear fuel, 348 00:19:41,000 --> 00:19:43,000 of this sort of spent uranium, 349 00:19:43,000 --> 00:19:46,000 and then the process starts at the top and kind of works down? 350 00:19:46,000 --> 00:19:49,000 BG: That's right. Today, you're always refueling the reactor, 351 00:19:49,000 --> 00:19:52,000 so you have lots of people and lots of controls that can go wrong: 352 00:19:52,000 --> 00:19:55,000 that thing where you're opening it up and moving things in and out, 353 00:19:55,000 --> 00:19:57,000 that's not good. 354 00:19:57,000 --> 00:20:02,000 So, if you have very cheap fuel that you can put 60 years in -- 355 00:20:02,000 --> 00:20:04,000 just think of it as a log -- 356 00:20:04,000 --> 00:20:07,000 put it down and not have those same complexities. 357 00:20:07,000 --> 00:20:12,000 And it just sits there and burns for the 60 years, and then it's done. 358 00:20:12,000 --> 00:20:16,000 CA: It's a nuclear power plant that is its own waste disposal solution. 359 00:20:16,000 --> 00:20:18,000 BG: Yeah. Well, what happens with the waste, 360 00:20:18,000 --> 00:20:23,000 you can let it sit there -- there's a lot less waste under this approach -- 361 00:20:23,000 --> 00:20:25,000 then you can actually take that, 362 00:20:25,000 --> 00:20:28,000 and put it into another one and burn that. 363 00:20:28,000 --> 00:20:32,000 And we start off actually by taking the waste that exists today, 364 00:20:32,000 --> 00:20:36,000 that's sitting in these cooling pools or dry casking by reactors -- 365 00:20:36,000 --> 00:20:38,000 that's our fuel to begin with. 366 00:20:38,000 --> 00:20:41,000 So, the thing that's been a problem from those reactors 367 00:20:41,000 --> 00:20:43,000 is actually what gets fed into ours, 368 00:20:43,000 --> 00:20:46,000 and you're reducing the volume of the waste quite dramatically 369 00:20:46,000 --> 00:20:48,000 as you're going through this process. 370 00:20:48,000 --> 00:20:50,000 CA: I mean, you're talking to different people around the world 371 00:20:50,000 --> 00:20:52,000 about the possibilities here. 372 00:20:52,000 --> 00:20:55,000 Where is there most interest in actually doing something with this? 373 00:20:55,000 --> 00:20:58,000 BG: Well, we haven't picked a particular place, 374 00:20:58,000 --> 00:21:06,000 and there's all these interesting disclosure rules about anything that's called "nuclear," 375 00:21:06,000 --> 00:21:08,000 so we've got a lot of interest, 376 00:21:08,000 --> 00:21:12,000 that people from the company have been in Russia, India, China -- 377 00:21:12,000 --> 00:21:14,000 I've been back seeing the secretary of energy here, 378 00:21:14,000 --> 00:21:18,000 talking about how this fits into the energy agenda. 379 00:21:18,000 --> 00:21:21,000 So I'm optimistic. You know, the French and Japanese have done some work. 380 00:21:21,000 --> 00:21:25,000 This is a variant on something that has been done. 381 00:21:25,000 --> 00:21:29,000 It's an important advance, but it's like a fast reactor, 382 00:21:29,000 --> 00:21:31,000 and a lot of countries have built them, 383 00:21:31,000 --> 00:21:36,000 so anybody who's done a fast reactor is a candidate to be where the first one gets built. 384 00:21:36,000 --> 00:21:41,000 CA: So, in your mind, timescale and likelihood 385 00:21:41,000 --> 00:21:44,000 of actually taking something like this live? 386 00:21:44,000 --> 00:21:49,000 BG: Well, we need -- for one of these high-scale, electro-generation things 387 00:21:49,000 --> 00:21:51,000 that's very cheap, 388 00:21:51,000 --> 00:21:55,000 we have 20 years to invent and then 20 years to deploy. 389 00:21:55,000 --> 00:22:00,000 That's sort of the deadline that the environmental models 390 00:22:00,000 --> 00:22:02,000 have shown us that we have to meet. 391 00:22:02,000 --> 00:22:07,000 And, you know, TerraPower, if things go well -- which is wishing for a lot -- 392 00:22:07,000 --> 00:22:09,000 could easily meet that. 393 00:22:09,000 --> 00:22:12,000 And there are, fortunately now, dozens of companies -- 394 00:22:12,000 --> 00:22:14,000 we need it to be hundreds -- 395 00:22:14,000 --> 00:22:16,000 who, likewise, if their science goes well, 396 00:22:16,000 --> 00:22:19,000 if the funding for their pilot plants goes well, 397 00:22:19,000 --> 00:22:21,000 that they can compete for this. 398 00:22:21,000 --> 00:22:23,000 And it's best if multiple succeed, 399 00:22:23,000 --> 00:22:26,000 because then you could use a mix of these things. 400 00:22:26,000 --> 00:22:28,000 We certainly need one to succeed. 401 00:22:28,000 --> 00:22:31,000 CA: In terms of big-scale possible game changes, 402 00:22:31,000 --> 00:22:34,000 is this the biggest that you're aware of out there? 403 00:22:34,000 --> 00:22:38,000 BG: An energy breakthrough is the most important thing. 404 00:22:38,000 --> 00:22:40,000 It would have been, even without the environmental constraint, 405 00:22:40,000 --> 00:22:45,000 but the environmental constraint just makes it so much greater. 406 00:22:45,000 --> 00:22:48,000 In the nuclear space, there are other innovators. 407 00:22:48,000 --> 00:22:51,000 You know, we don't know their work as well as we know this one, 408 00:22:51,000 --> 00:22:54,000 but the modular people, that's a different approach. 409 00:22:54,000 --> 00:22:58,000 There's a liquid-type reactor, which seems a little hard, 410 00:22:58,000 --> 00:23:00,000 but maybe they say that about us. 411 00:23:00,000 --> 00:23:03,000 And so, there are different ones, 412 00:23:03,000 --> 00:23:06,000 but the beauty of this is a molecule of uranium 413 00:23:06,000 --> 00:23:10,000 has a million times as much energy as a molecule of, say, coal, 414 00:23:10,000 --> 00:23:13,000 and so -- if you can deal with the negatives, 415 00:23:13,000 --> 00:23:16,000 which are essentially the radiation -- 416 00:23:16,000 --> 00:23:19,000 the footprint and cost, the potential, 417 00:23:19,000 --> 00:23:21,000 in terms of effect on land and various things, 418 00:23:21,000 --> 00:23:25,000 is almost in a class of its own. 419 00:23:25,000 --> 00:23:29,000 CA: If this doesn't work, then what? 420 00:23:29,000 --> 00:23:33,000 Do we have to start taking emergency measures 421 00:23:33,000 --> 00:23:36,000 to try and keep the temperature of the earth stable? 422 00:23:36,000 --> 00:23:38,000 BG: If you get into that situation, 423 00:23:38,000 --> 00:23:43,000 it's like if you've been over-eating, and you're about to have a heart attack: 424 00:23:43,000 --> 00:23:47,000 Then where do you go? You may need heart surgery or something. 425 00:23:47,000 --> 00:23:51,000 There is a line of research on what's called geoengineering, 426 00:23:51,000 --> 00:23:54,000 which are various techniques that would delay the heating 427 00:23:54,000 --> 00:23:57,000 to buy us 20 or 30 years to get our act together. 428 00:23:57,000 --> 00:23:59,000 Now, that's just an insurance policy. 429 00:23:59,000 --> 00:24:01,000 You hope you don't need to do that. 430 00:24:01,000 --> 00:24:03,000 Some people say you shouldn't even work on the insurance policy 431 00:24:03,000 --> 00:24:05,000 because it might make you lazy, 432 00:24:05,000 --> 00:24:09,000 that you'll keep eating because you know heart surgery will be there to save you. 433 00:24:09,000 --> 00:24:12,000 I'm not sure that's wise, given the importance of the problem, 434 00:24:12,000 --> 00:24:16,000 but there's now the geoengineering discussion 435 00:24:16,000 --> 00:24:20,000 about -- should that be in the back pocket in case things happen faster, 436 00:24:20,000 --> 00:24:23,000 or this innovation goes a lot slower than we expect? 437 00:24:25,000 --> 00:24:30,000 CA: Climate skeptics: If you had a sentence or two to say to them, 438 00:24:30,000 --> 00:24:34,000 how might you persuade them that they're wrong? 439 00:24:35,000 --> 00:24:39,000 BG: Well, unfortunately, the skeptics come in different camps. 440 00:24:39,000 --> 00:24:43,000 The ones who make scientific arguments are very few. 441 00:24:43,000 --> 00:24:46,000 Are they saying that there's negative feedback effects 442 00:24:46,000 --> 00:24:48,000 that have to do with clouds that offset things? 443 00:24:48,000 --> 00:24:51,000 There are very, very few things that they can even say 444 00:24:51,000 --> 00:24:54,000 there's a chance in a million of those things. 445 00:24:54,000 --> 00:24:57,000 The main problem we have here, it's kind of like AIDS. 446 00:24:57,000 --> 00:25:01,000 You make the mistake now, and you pay for it a lot later. 447 00:25:01,000 --> 00:25:05,000 And so, when you have all sorts of urgent problems, 448 00:25:05,000 --> 00:25:08,000 the idea of taking pain now that has to do with a gain later, 449 00:25:08,000 --> 00:25:11,000 and a somewhat uncertain pain thing -- 450 00:25:11,000 --> 00:25:17,000 in fact, the IPCC report, that's not necessarily the worst case, 451 00:25:17,000 --> 00:25:19,000 and there are people in the rich world who look at IPCC 452 00:25:19,000 --> 00:25:23,000 and say, "OK, that isn't that big of a deal." 453 00:25:23,000 --> 00:25:27,000 The fact is it's that uncertain part that should move us towards this. 454 00:25:27,000 --> 00:25:30,000 But my dream here is that, if you can make it economic, 455 00:25:30,000 --> 00:25:32,000 and meet the CO2 constraints, 456 00:25:32,000 --> 00:25:34,000 then the skeptics say, "OK, 457 00:25:34,000 --> 00:25:36,000 I don't care that it doesn't put out CO2, 458 00:25:36,000 --> 00:25:38,000 I kind of wish it did put out CO2, 459 00:25:38,000 --> 00:25:42,000 but I guess I'll accept it because it's cheaper than what's come before." 460 00:25:42,000 --> 00:25:46,000 (Applause) 461 00:25:46,000 --> 00:25:50,000 CA: And so, that would be your response to the Bjorn Lomborg argument, 462 00:25:50,000 --> 00:25:54,000 that basically if you spend all this energy trying to solve the CO2 problem, 463 00:25:54,000 --> 00:25:56,000 it's going to take away all your other goals 464 00:25:56,000 --> 00:25:59,000 of trying to rid the world of poverty and malaria and so forth, 465 00:25:59,000 --> 00:26:03,000 it's a stupid waste of the Earth's resources to put money towards that 466 00:26:03,000 --> 00:26:05,000 when there are better things we can do. 467 00:26:05,000 --> 00:26:08,000 BG: Well, the actual spending on the R&D piece -- 468 00:26:08,000 --> 00:26:12,000 say the U.S. should spend 10 billion a year more than it is right now -- 469 00:26:12,000 --> 00:26:14,000 it's not that dramatic. 470 00:26:14,000 --> 00:26:16,000 It shouldn't take away from other things. 471 00:26:16,000 --> 00:26:19,000 The thing you get into big money on, and this, reasonable people can disagree, 472 00:26:19,000 --> 00:26:22,000 is when you have something that's non-economic and you're trying to fund that -- 473 00:26:22,000 --> 00:26:25,000 that, to me, mostly is a waste. 474 00:26:25,000 --> 00:26:28,000 Unless you're very close and you're just funding the learning curve 475 00:26:28,000 --> 00:26:30,000 and it's going to get very cheap, 476 00:26:30,000 --> 00:26:34,000 I believe we should try more things that have a potential 477 00:26:34,000 --> 00:26:36,000 to be far less expensive. 478 00:26:36,000 --> 00:26:41,000 If the trade-off you get into is, "Let's make energy super expensive," 479 00:26:41,000 --> 00:26:43,000 then the rich can afford that. 480 00:26:43,000 --> 00:26:46,000 I mean, all of us here could pay five times as much for our energy 481 00:26:46,000 --> 00:26:48,000 and not change our lifestyle. 482 00:26:48,000 --> 00:26:50,000 The disaster is for that two billion. 483 00:26:50,000 --> 00:26:52,000 And even Lomborg has changed. 484 00:26:52,000 --> 00:26:57,000 His shtick now is, "Why isn't the R&D getting more discussed?" 485 00:26:57,000 --> 00:26:59,000 He's still, because of his earlier stuff, 486 00:26:59,000 --> 00:27:01,000 still associated with the skeptic camp, 487 00:27:01,000 --> 00:27:04,000 but he's realized that's a pretty lonely camp, 488 00:27:04,000 --> 00:27:07,000 and so, he's making the R&D point. 489 00:27:07,000 --> 00:27:12,000 And so there is a thread of something that I think is appropriate. 490 00:27:12,000 --> 00:27:15,000 The R&D piece, it's crazy how little it's funded. 491 00:27:15,000 --> 00:27:18,000 CA: Well Bill, I suspect I speak on the behalf of most people here 492 00:27:18,000 --> 00:27:21,000 to say I really hope your wish comes true. Thank you so much. 493 00:27:21,000 --> 00:27:23,000 BG: Thank you. 494 00:27:23,000 --> 00:27:26,000 (Applause)