WEBVTT 00:00:00.000 --> 00:00:00.600 align:middle line:90% 00:00:00.600 --> 00:00:02.490 align:middle line:84% The roof of my house in Tucson used 00:00:02.490 --> 00:00:05.610 align:middle line:84% to leak whenever the rain was driven hard by the wind. 00:00:05.610 --> 00:00:07.350 align:middle line:84% The house where I grew up in Laguna 00:00:07.350 --> 00:00:10.650 align:middle line:84% also leaked if the rain was hard and steady. 00:00:10.650 --> 00:00:12.780 align:middle line:84% The leaks used to appear at the edges 00:00:12.780 --> 00:00:15.150 align:middle line:84% where the walls joined the ceilings. 00:00:15.150 --> 00:00:18.300 align:middle line:84% That's what used to happen to the old time Pueblo roofs. 00:00:18.300 --> 00:00:21.030 align:middle line:84% The alternate layers of clay and sand 00:00:21.030 --> 00:00:24.420 align:middle line:84% were nearly impermeable except at the edges. 00:00:24.420 --> 00:00:27.360 align:middle line:84% The adobe mud that leaked down the walls of our house 00:00:27.360 --> 00:00:32.850 align:middle line:84% was the color and consistency of melted chocolate ice cream. 00:00:32.850 --> 00:00:36.100 align:middle line:84% There is an old story about a terrible winter, 00:00:36.100 --> 00:00:40.170 align:middle line:84% which followed eight years of drought and poor harvests. 00:00:40.170 --> 00:00:43.620 align:middle line:84% Heavy rain and snow saturated the roofs. 00:00:43.620 --> 00:00:47.010 align:middle line:84% Storehouse and granary roofs collapsed. 00:00:47.010 --> 00:00:50.220 align:middle line:84% The meager rations from their scant harvests 00:00:50.220 --> 00:00:53.250 align:middle line:84% and even the seeds they had saved for the spring planting 00:00:53.250 --> 00:00:55.230 align:middle line:90% were lost. 00:00:55.230 --> 00:00:58.680 align:middle line:84% The people starved and they refer to that winter 00:00:58.680 --> 00:01:03.570 align:middle line:84% as "the winter we had to eat our dead children in order 00:01:03.570 --> 00:01:04.140 align:middle line:90% to survive." 00:01:04.140 --> 00:01:08.640 align:middle line:90% 00:01:08.640 --> 00:01:10.900 align:middle line:84% I first saw household water systems 00:01:10.900 --> 00:01:15.360 align:middle line:84% which use rainwater collected off roofs in Ketchikan, Alaska 00:01:15.360 --> 00:01:20.790 align:middle line:84% where the annual rainfall exceeds 160 inches. 00:01:20.790 --> 00:01:23.040 align:middle line:84% Due to the proximity of saltwater, 00:01:23.040 --> 00:01:26.910 align:middle line:84% drilling wells for freshwater is an unsatisfactory 00:01:26.910 --> 00:01:31.860 align:middle line:84% so rural home sites depend on big wooden storage tanks which 00:01:31.860 --> 00:01:35.400 align:middle line:84% collect rainwater from tank tops and from gutter systems 00:01:35.400 --> 00:01:37.920 align:middle line:90% off the roof of the house. 00:01:37.920 --> 00:01:40.200 align:middle line:84% If more than 10 days pass without rain 00:01:40.200 --> 00:01:42.510 align:middle line:84% in southeastern Alaska, households 00:01:42.510 --> 00:01:44.100 align:middle line:90% begin to run out of water. 00:01:44.100 --> 00:01:47.610 align:middle line:84% If more than 14 days pass without rain, 00:01:47.610 --> 00:01:50.310 align:middle line:84% the level of the big lake north of Ketchikan 00:01:50.310 --> 00:01:52.920 align:middle line:84% falls below the level of the intake valves 00:01:52.920 --> 00:01:56.550 align:middle line:84% to the municipal water pumps and the pumps shut off. 00:01:56.550 --> 00:02:00.600 align:middle line:84% Without all the rain, the lush foliage and thick underbrush 00:02:00.600 --> 00:02:03.780 align:middle line:84% dry out And the great Tongass forest 00:02:03.780 --> 00:02:05.865 align:middle line:84% faces imminent danger of wildfire. 00:02:05.865 --> 00:02:08.490 align:middle line:90% 00:02:08.490 --> 00:02:10.830 align:middle line:84% My old ranch house in the Tucson mountains 00:02:10.830 --> 00:02:13.230 align:middle line:84% has a similar rainwater catchment system 00:02:13.230 --> 00:02:15.840 align:middle line:84% which routes all the rainwater from the roof 00:02:15.840 --> 00:02:18.210 align:middle line:90% into a big concrete pool. 00:02:18.210 --> 00:02:20.160 align:middle line:84% Runoff from a gravel covered slope 00:02:20.160 --> 00:02:23.100 align:middle line:84% is also harvested and stored in the pool. 00:02:23.100 --> 00:02:25.980 align:middle line:84% Water in the Tucson mountains has never been abundant. 00:02:25.980 --> 00:02:29.400 align:middle line:84% Wells must tap into deposits of fossil water, 00:02:29.400 --> 00:02:32.490 align:middle line:84% underground pools and lakes formed by steam 00:02:32.490 --> 00:02:34.860 align:middle line:90% trapped in molten lava. 00:02:34.860 --> 00:02:38.610 align:middle line:84% The two ranch wells produce only meager amounts of water. 00:02:38.610 --> 00:02:40.890 align:middle line:84% When I first came to this old ranch house, 00:02:40.890 --> 00:02:45.600 align:middle line:84% rainwater was the primary water source for household uses. 00:02:45.600 --> 00:02:48.510 align:middle line:84% Tucson sits on an aquifer which has receded 00:02:48.510 --> 00:02:51.840 align:middle line:84% so far that the 200-year-old cottonwood trees, which 00:02:51.840 --> 00:02:55.140 align:middle line:84% grow along the Tanque Verde Wash, are dying. 00:02:55.140 --> 00:02:57.180 align:middle line:84% City wells on the south side of Tucson 00:02:57.180 --> 00:02:59.820 align:middle line:84% are contaminated with industrial chemicals 00:02:59.820 --> 00:03:02.040 align:middle line:90% and are no longer pumped. 00:03:02.040 --> 00:03:05.010 align:middle line:84% Hundreds and hundreds of miles of concrete canals, 00:03:05.010 --> 00:03:07.560 align:middle line:84% which cost billions of tax dollars, 00:03:07.560 --> 00:03:10.830 align:middle line:84% carry salty Colorado River water to Phoenix 00:03:10.830 --> 00:03:13.350 align:middle line:90% and most years to Tucson. 00:03:13.350 --> 00:03:16.440 align:middle line:84% But the river must be shared with other western states 00:03:16.440 --> 00:03:17.910 align:middle line:90% and with Mexico. 00:03:17.910 --> 00:03:21.600 align:middle line:84% In the driest years, when the level of the Colorado River 00:03:21.600 --> 00:03:25.170 align:middle line:84% falls, there will not be enough water to go around 00:03:25.170 --> 00:03:27.720 align:middle line:84% and the canals to Tucson will be dry. 00:03:27.720 --> 00:03:30.990 align:middle line:90% 00:03:30.990 --> 00:03:33.780 align:middle line:84% In Tucson and Phoenix, more young children 00:03:33.780 --> 00:03:36.900 align:middle line:84% die from drowning than from traffic accidents. 00:03:36.900 --> 00:03:39.420 align:middle line:84% Backyard swimming pools are numerous-- 00:03:39.420 --> 00:03:43.530 align:middle line:84% the clear still water, the colorful tiles, pool steps 00:03:43.530 --> 00:03:46.980 align:middle line:84% and pool ladders are all designed to be attractive 00:03:46.980 --> 00:03:48.600 align:middle line:90% and inviting. 00:03:48.600 --> 00:03:51.690 align:middle line:90% A safety gate is left unlatched. 00:03:51.690 --> 00:03:55.500 align:middle line:84% The parents always insist they only looked away for a moment. 00:03:55.500 --> 00:03:59.220 align:middle line:90% 00:03:59.220 --> 00:04:02.580 align:middle line:84% The warm Japanese current brings Ketchikan, Alaska 00:04:02.580 --> 00:04:05.880 align:middle line:84% more than 160 inches of rain every year. 00:04:05.880 --> 00:04:09.090 align:middle line:90% Leaky roofs are inevitable. 00:04:09.090 --> 00:04:12.000 align:middle line:84% The jade green moss thrives on roofs, 00:04:12.000 --> 00:04:14.940 align:middle line:84% forming thick velvety slabs, which 00:04:14.940 --> 00:04:16.890 align:middle line:84% grow until the weight of the moss 00:04:16.890 --> 00:04:19.890 align:middle line:90% finally collapses the roof. 00:04:19.890 --> 00:04:22.120 align:middle line:90% All this rain is necessary. 00:04:22.120 --> 00:04:24.930 align:middle line:84% Otherwise, the water levels of the rivers and lakes 00:04:24.930 --> 00:04:28.020 align:middle line:84% decline so much that the spawning salmon 00:04:28.020 --> 00:04:31.890 align:middle line:84% and steelhead trout can't make their way up river. 00:04:31.890 --> 00:04:34.800 align:middle line:84% Dry summers cause the berries to be scarce 00:04:34.800 --> 00:04:38.130 align:middle line:84% and the black bears get hungry and come out of the forest 00:04:38.130 --> 00:04:40.320 align:middle line:84% to eat garbage and small pet dogs. 00:04:40.320 --> 00:04:45.180 align:middle line:90% 00:04:45.180 --> 00:04:49.200 align:middle line:84% Tribal clans acknowledge the kinship between human beings 00:04:49.200 --> 00:04:50.940 align:middle line:90% and other beings. 00:04:50.940 --> 00:04:53.730 align:middle line:84% Most of the clans in southeastern Alaska 00:04:53.730 --> 00:04:58.440 align:middle line:84% are linked to the sea, coho salmon, king salmon, humpback 00:04:58.440 --> 00:05:01.950 align:middle line:84% salmon, halibut, dogfish, killer whale, and sea lion 00:05:01.950 --> 00:05:06.090 align:middle line:84% all have human clans people in the villages. 00:05:06.090 --> 00:05:09.810 align:middle line:84% Freshwater clans include beaver, otter, and frog. 00:05:09.810 --> 00:05:14.970 align:middle line:84% There are clans of grizzly bear, wolf, raven, and eagle who all 00:05:14.970 --> 00:05:17.970 align:middle line:90% owe their existence to the sea. 00:05:17.970 --> 00:05:20.400 align:middle line:84% The tribal people of the Alaska coast 00:05:20.400 --> 00:05:24.030 align:middle line:84% built great ocean going boats of yellow cedar 00:05:24.030 --> 00:05:27.750 align:middle line:84% and sailed the coastal perimeter of the Americas. 00:05:27.750 --> 00:05:30.420 align:middle line:84% Yet the clan totem poles frequently 00:05:30.420 --> 00:05:34.560 align:middle line:84% include the wan face of the drowned man 00:05:34.560 --> 00:05:38.370 align:middle line:84% used to fill space between other totem figures. 00:05:38.370 --> 00:05:42.900 align:middle line:84% Great sailors, though they were still the mighty North Pacific, 00:05:42.900 --> 00:05:46.290 align:middle line:84% often became so lonely for her human children 00:05:46.290 --> 00:05:49.500 align:middle line:84% that she brought them back home to her. 00:05:49.500 --> 00:05:50.000 align:middle line:90%