1 00:00:00,000 --> 00:00:01,710 Climate models predict longer 2 00:00:01,730 --> 00:00:04,500 and more severe droughts in a new NASA study. 3 00:00:04,520 --> 00:00:06,330 By the end of the 21st century, 4 00:00:06,350 --> 00:00:08,130 droughts in the southwestern U.S. 5 00:00:08,150 --> 00:00:10,180 may last more than 30 years. 6 00:00:10,200 --> 00:00:13,430 Scientists say this is due to human-caused climate change. 7 00:00:13,450 --> 00:00:14,995