1 00:00:00,030 --> 00:00:04,030 [rain, thunder] 2 00:00:04,050 --> 00:00:08,060 [rain, thunder] 3 00:00:08,080 --> 00:00:12,080 [waves] As humans, we're well 4 00:00:12,100 --> 00:00:16,100 aware we need water to live. Fortunately for us, we live on 5 00:00:16,120 --> 00:00:20,160 a water planet. But that doesn't mean we have an entire globe of H2O 6 00:00:20,180 --> 00:00:24,180 to use as we please. 7 00:00:24,200 --> 00:00:28,230 So just how does the usable water break down for us? 8 00:00:28,250 --> 00:00:32,260 A giant 97 percent of Earth's water is in the ocean, so we can't 9 00:00:32,280 --> 00:00:36,270 use that. Three percent is freshwater, but even in that small 10 00:00:36,290 --> 00:00:40,300 sliver, about two percent is locked in glaciers, ice caps, and groundwater. 11 00:00:40,320 --> 00:00:44,340 That leaves about one percent of the freshwater on 12 00:00:44,360 --> 00:00:48,370 Earth that is accessible and usable by humans. Let's imagine 13 00:00:48,390 --> 00:00:52,400 all of that accessible freshwater fits into this tiny pool. Now we'll get to 14 00:00:52,420 --> 00:00:56,420 some small numbers when we look at global freshwater. 15 00:00:56,440 --> 00:01:00,430 16 00:01:00,450 --> 00:01:04,460 17 00:01:04,480 --> 00:01:08,480 [music] 18 00:01:08,500 --> 00:01:12,500 19 00:01:12,520 --> 00:01:16,570 20 00:01:16,590 --> 00:01:20,600 There really is a small fraction of usable and accessible freshwater on this 21 00:01:20,620 --> 00:01:24,650 water planet, so how do we use that tiny pool? In the 22 00:01:24,670 --> 00:01:28,670 United States, about 49 percent is used in thermoelectric power production. 23 00:01:28,690 --> 00:01:32,710 While agricultural irrigation makes up about 31 24 00:01:32,730 --> 00:01:36,710 percent. Eleven percent goes to public use in our cities and towns. 25 00:01:36,730 --> 00:01:40,740 Four percent goes into industry and manufacturing, 26 00:01:40,760 --> 00:01:44,750 and one percent is domestic use. The water coming out of our faucets 27 00:01:44,770 --> 00:01:48,800 largely comes from precipitation. Measuring how much or 28 00:01:48,820 --> 00:01:52,850 how little precipitation falls can impact how we live our daily lives. 29 00:01:52,870 --> 00:01:56,880 Elsewhere around the globe, in developing countries, agricultural irrigation 30 00:01:56,900 --> 00:02:00,920 accounts for about 70 percent of freshwater use, 31 00:02:00,940 --> 00:02:04,970 while industrial use is 20 percent, and 10 percent for public consumption. 32 00:02:04,990 --> 00:02:09,000 In places where access to usable freshwater is greatly limited, 33 00:02:09,020 --> 00:02:13,020 knowing when and where precipitation may fall is critical to livelihoods. 34 00:02:13,040 --> 00:02:17,080 Precipitation replenishes these tiny reservoirs of 35 00:02:17,100 --> 00:02:21,140 freshwater, and data from the Global Precipitation Measurement mission will help 36 00:02:21,160 --> 00:02:25,200 farmers, ranchers, and policy makers in these regions plan for 37 00:02:25,220 --> 00:02:29,250 periods of drought, flooding and other extreme weather. 38 00:02:29,270 --> 00:02:33,290 [music] 39 00:02:33,310 --> 00:02:37,310 [music] 40 00:02:37,330 --> 00:02:41,320 41 00:02:41,340 --> 00:02:45,340 42 00:02:45,360 --> 00:02:49,370 43 00:02:49,390 --> 00:02:49,516