WEBVTT FILE 1 00:00:00.020 --> 00:00:04.070 Earth just experienced the warmest year on record, again. 2 00:00:04.070 --> 00:00:08.200 3 00:00:08.200 --> 00:00:12.220 4 00:00:12.220 --> 00:00:16.280 2016 was the third year in a row with record-high surface temperature. 5 00:00:16.280 --> 00:00:20.460 6 00:00:20.460 --> 00:00:24.510 part of a decades-long warming trend. 7 00:00:24.510 --> 00:00:28.620 8 00:00:28.620 --> 00:00:32.740 NASA scientists track global temperature changes 9 00:00:32.740 --> 00:00:36.770 10 00:00:36.770 --> 00:00:40.860 to better understand Earth’s changing climate. 11 00:00:40.860 --> 00:00:44.900 12 00:00:44.900 --> 00:00:48.782