WEBVTT FILE 1 00:00:00.010 --> 00:00:04.040 2 00:00:04.060 --> 00:00:13.730 [music] 3 00:00:13.750 --> 00:00:16.350 Is there any merit to the studies that show 4 00:00:16.370 --> 00:00:20.570 that historical CO2 levels lag behind temperature changes, not lead them. 5 00:00:20.590 --> 00:00:22.390 6 00:00:22.410 --> 00:00:24.420 Well yes, there's merit to that. 7 00:00:24.440 --> 00:00:31.440 In fact in the pre-industrial age, the CO2 response to temperature was that 8 00:00:31.460 --> 00:00:35.460 the temperature would go up and CO2 would go up. 9 00:00:35.480 --> 00:00:37.730 Or if the temperature went down, CO2 would go down. 10 00:00:37.750 --> 00:00:44.580 And the reason for that is when the temperature went up, the whole biosphere revved up and emitted CO2, 11 00:00:44.600 --> 00:00:48.640 and we had more CO2 in the atmosphere. So we understand that process. 12 00:00:48.660 --> 00:00:52.660 The problem for the science community is in the post-industrial age 13 00:00:52.680 --> 00:00:56.690 the CO2 rise is preceding the temperature rise. 14 00:00:56.710 --> 00:01:00.220 So two different things happened, one pre-industrial, 15 00:01:00.240 --> 00:01:04.060 where temperature was driving the CO2, and post-industrial, 16 00:01:04.080 --> 00:01:09.730 where CO2 was driving temperature. Which means a completely different physical-biological process is going on 17 00:01:09.750 --> 00:01:12.810 And we don't understand what the consequence of that change is. 18 00:01:12.830 --> 00:01:16.870 It is a fundamental change to how the earth works 19 00:01:16.890 --> 00:01:20.920 and the earth's radiation balance works. 20 00:01:20.940 --> 00:01:24.280 And so, we're very concerned because we don't see any restraining force 21 00:01:24.300 --> 00:01:30.020 on continued increase in temperature due to continued increase in CO2. And that's a problem. 22 00:01:30.040 --> 00:01:37.080 [music] 23 00:01:37.100 --> 00:01:40.013