1 00:00:00,020 --> 00:00:04,070 Earth just experienced the warmest year on record, again. 2 00:00:12,220 --> 00:00:16,280 2016 was the third year in a row with record-high surface temperature, 3 00:00:20,460 --> 00:00:24,510 part of a decades-long warming trend.