WEBVTT 00:00:00.000 --> 00:00:00.960 align:middle line:90% 00:00:00.960 --> 00:00:03.390 align:middle line:84% The first year I lived in Ketchikan, Alaska, 00:00:03.390 --> 00:00:09.570 align:middle line:84% 42.5 inches of rain fell during the 31 days of October. 00:00:09.570 --> 00:00:12.390 align:middle line:84% I began to better appreciate a Tlingit 00:00:12.390 --> 00:00:16.379 align:middle line:84% story I had heard about a village on a small island 00:00:16.379 --> 00:00:19.920 align:middle line:84% occupied by sea lion people, who originally 00:00:19.920 --> 00:00:22.380 align:middle line:90% had been human beings. 00:00:22.380 --> 00:00:26.040 align:middle line:84% A great storm blew in, which lasted for weeks. 00:00:26.040 --> 00:00:28.500 align:middle line:84% And when the storm finally had passed, 00:00:28.500 --> 00:00:32.920 align:middle line:84% the people on the small island no longer possessed human form. 00:00:32.920 --> 00:00:36.660 align:middle line:84% They all had become sea lions because that was how they could 00:00:36.660 --> 00:00:38.280 align:middle line:90% best survive in that place. 00:00:38.280 --> 00:00:42.420 align:middle line:90% 00:00:42.420 --> 00:00:43.390 align:middle line:90% For a long time. 00:00:43.390 --> 00:00:45.660 align:middle line:84% I had a great many Sonoran red-spotted toads 00:00:45.660 --> 00:00:48.490 align:middle line:84% around the rainwater pool behind my house. 00:00:48.490 --> 00:00:52.020 align:middle line:84% I also had a few cattails and a yellow water lily. 00:00:52.020 --> 00:00:54.030 align:middle line:84% This was a modest accomplishment, 00:00:54.030 --> 00:00:56.880 align:middle line:84% since the pool is replenished only by rainfall 00:00:56.880 --> 00:01:01.170 align:middle line:84% and there is no electricity to operate a filtration system. 00:01:01.170 --> 00:01:03.780 align:middle line:84% Hundreds of toads used to sing all night 00:01:03.780 --> 00:01:09.720 align:middle line:84% in magnificent choruses with complex harmonies. 00:01:09.720 --> 00:01:12.810 align:middle line:84% One summer, when the water level of the pool was low, 00:01:12.810 --> 00:01:16.620 align:middle line:84% a man I had recently met brought his sons and his dog for dinner 00:01:16.620 --> 00:01:18.030 align:middle line:90% at my house. 00:01:18.030 --> 00:01:20.190 align:middle line:84% The boys were 11 and 12 years old, 00:01:20.190 --> 00:01:23.190 align:middle line:84% and they had been adopted off a Canadian Indian reserve 00:01:23.190 --> 00:01:25.110 align:middle line:90% by the man's wife. 00:01:25.110 --> 00:01:27.990 align:middle line:84% After dinner, the boys took the dog outside 00:01:27.990 --> 00:01:30.540 align:middle line:84% to enjoy the coolness of the twilight. 00:01:30.540 --> 00:01:33.300 align:middle line:84% A few minutes later, when the man and I joined the boys, 00:01:33.300 --> 00:01:36.480 align:middle line:84% we found them with the dog by the rainwater pool. 00:01:36.480 --> 00:01:39.630 align:middle line:84% Strewn all around the pool where the remains of toads, 00:01:39.630 --> 00:01:42.510 align:middle line:84% smashed flat by the boys and their dog. 00:01:42.510 --> 00:01:45.450 align:middle line:90% 00:01:45.450 --> 00:01:48.660 align:middle line:84% I managed to keep my composure until the dinner guests 00:01:48.660 --> 00:01:50.760 align:middle line:90% and their dog had left. 00:01:50.760 --> 00:01:52.065 align:middle line:90% I never saw them again. 00:01:52.065 --> 00:01:54.780 align:middle line:90% 00:01:54.780 --> 00:01:58.800 align:middle line:84% The dinner guests from hell, I guess you could say. 00:01:58.800 --> 00:02:04.110 align:middle line:84% The night-long choirs of multitudes of toads ceased. 00:02:04.110 --> 00:02:06.510 align:middle line:84% The Chernobyl nuclear reactor disaster 00:02:06.510 --> 00:02:10.080 align:middle line:84% occurred not long afterward and may also-- 00:02:10.080 --> 00:02:13.770 align:middle line:84% didn't help-- and may also have affected the toad population. 00:02:13.770 --> 00:02:16.200 align:middle line:84% I guess that's pretty much established. 00:02:16.200 --> 00:02:18.950 align:middle line:84% It actually caused more human beings to die too-- 00:02:18.950 --> 00:02:21.690 align:middle line:84% babies born to babies died all over the world too. 00:02:21.690 --> 00:02:23.340 align:middle line:90% They don't say much about that. 00:02:23.340 --> 00:02:26.190 align:middle line:84% Last summer, the pool had polliwogs again 00:02:26.190 --> 00:02:29.220 align:middle line:84% and the descendants of the red-spotted toads, which 00:02:29.220 --> 00:02:33.960 align:middle line:84% had survived radioactive fallout and the boys with a dog. 00:02:33.960 --> 00:02:36.960 align:middle line:84% The night-long choirs have not resumed yet. 00:02:36.960 --> 00:02:39.345 align:middle line:84% The toads need a few more years to recover. 00:02:39.345 --> 00:02:42.810 align:middle line:90% 00:02:42.810 --> 00:02:45.150 align:middle line:84% Some months after the Chernobyl accident, 00:02:45.150 --> 00:02:47.640 align:middle line:84% neighborhood dogs trapped a big mule deer 00:02:47.640 --> 00:02:50.490 align:middle line:84% doe as she came to water at the pool. 00:02:50.490 --> 00:02:53.400 align:middle line:84% I heard the commotion of the dogs and water splashing, 00:02:53.400 --> 00:02:55.530 align:middle line:90% and I ran outside to the pool. 00:02:55.530 --> 00:02:58.480 align:middle line:84% I chased off the dogs with rocks and sticks, 00:02:58.480 --> 00:03:01.650 align:middle line:84% so the deer was able to escape unharmed. 00:03:01.650 --> 00:03:04.230 align:middle line:84% The water lily was trampled to pieces, 00:03:04.230 --> 00:03:06.930 align:middle line:90% and the cattail was torn apart. 00:03:06.930 --> 00:03:09.420 align:middle line:84% Still, I did not expect long-term damage 00:03:09.420 --> 00:03:11.400 align:middle line:90% from the deer's frenzy. 00:03:11.400 --> 00:03:14.190 align:middle line:84% But soon after the deer's ambush, 00:03:14.190 --> 00:03:18.360 align:middle line:84% a strange red algae with a texture of mucus 00:03:18.360 --> 00:03:21.210 align:middle line:84% began to float on the pool's surface. 00:03:21.210 --> 00:03:24.510 align:middle line:84% This red algae smothered the yellow water lily, 00:03:24.510 --> 00:03:26.040 align:middle line:90% and even the cattail died. 00:03:26.040 --> 00:03:29.750 align:middle line:90% 00:03:29.750 --> 00:03:32.600 align:middle line:84% I did not visit the pool often after that. 00:03:32.600 --> 00:03:35.360 align:middle line:84% Red algae slime covered everything. 00:03:35.360 --> 00:03:37.910 align:middle line:84% But sometimes when I did visit the pool, 00:03:37.910 --> 00:03:41.300 align:middle line:84% I found the floating remains of drowned creatures. 00:03:41.300 --> 00:03:43.610 align:middle line:84% The red algae on the surface of the water 00:03:43.610 --> 00:03:47.720 align:middle line:84% gave the appearance of solid material, not liquid. 00:03:47.720 --> 00:03:49.850 align:middle line:84% I considered destroying the pool, 00:03:49.850 --> 00:03:53.120 align:middle line:84% but since most of the desert animals and birds 00:03:53.120 --> 00:03:56.360 align:middle line:84% managed not to drown and depended on the rainwater pool 00:03:56.360 --> 00:03:59.720 align:middle line:84% for survival, I gave the pool a reprieve. 00:03:59.720 --> 00:04:03.590 align:middle line:84% But then I discovered a decomposing mule deer partially 00:04:03.590 --> 00:04:07.070 align:middle line:84% submerged, and I decided that I'd had enough of the pool. 00:04:07.070 --> 00:04:10.070 align:middle line:84% I ordered six dump truck loads of crushed rock 00:04:10.070 --> 00:04:13.610 align:middle line:90% to begin to fill in the pool. 00:04:13.610 --> 00:04:17.029 align:middle line:84% But then I got tired of shoveling the rock 00:04:17.029 --> 00:04:19.680 align:middle line:84% into the pool-- kind of what is-- 00:04:19.680 --> 00:04:21.709 align:middle line:90% well, I shoveled a lot in there. 00:04:21.709 --> 00:04:25.820 align:middle line:84% The crushed rock, but not six dump truck loads, OK, 00:04:25.820 --> 00:04:29.690 align:middle line:84% because look what happened which is a little work, 00:04:29.690 --> 00:04:31.760 align:middle line:90% a little wheelbarrow pushing. 00:04:31.760 --> 00:04:35.150 align:middle line:84% The crushed rock created a natural escape ramp, 00:04:35.150 --> 00:04:37.580 align:middle line:84% which the lizards, birds, and other animals 00:04:37.580 --> 00:04:39.440 align:middle line:90% use to avoid drowning. 00:04:39.440 --> 00:04:41.880 align:middle line:84% See, this is an old, defunct swimming pool, 00:04:41.880 --> 00:04:44.660 align:middle line:84% which drowns so many kids and stuff, too. 00:04:44.660 --> 00:04:47.930 align:middle line:84% The rock also acted as a natural filter, 00:04:47.930 --> 00:04:51.530 align:middle line:84% and the red algae seemed less hardy than before. 00:04:51.530 --> 00:04:53.900 align:middle line:90% I decided to try one more time. 00:04:53.900 --> 00:04:56.990 align:middle line:84% I resumed my struggle against the red algae. 00:04:56.990 --> 00:04:59.660 align:middle line:84% I skimmed off tons of the red algae, 00:04:59.660 --> 00:05:02.180 align:middle line:84% but this only seemed to stimulate the red algae's 00:05:02.180 --> 00:05:04.070 align:middle line:90% growth. 00:05:04.070 --> 00:05:06.050 align:middle line:90% I tried water plants. 00:05:06.050 --> 00:05:08.810 align:middle line:84% At first, red algae overpowered and smothered 00:05:08.810 --> 00:05:11.660 align:middle line:84% the roots of all the water plants I tried-- 00:05:11.660 --> 00:05:14.690 align:middle line:84% duckweed, water lettuce, or water lily. 00:05:14.690 --> 00:05:17.000 align:middle line:84% They all succumb to the red algae 00:05:17.000 --> 00:05:20.780 align:middle line:84% and its ally, the fierce ultraviolet rays of the sun. 00:05:20.780 --> 00:05:23.450 align:middle line:90% 00:05:23.450 --> 00:05:26.090 align:middle line:84% I located some water hyacinths after I 00:05:26.090 --> 00:05:28.640 align:middle line:84% read that they are hardy and pestiferous, 00:05:28.640 --> 00:05:32.780 align:middle line:84% the bane of waterways and lakes throughout the tropics. 00:05:32.780 --> 00:05:35.360 align:middle line:84% The water hyacinth might have a better chance 00:05:35.360 --> 00:05:38.420 align:middle line:84% against the red algae in the summer sun. 00:05:38.420 --> 00:05:41.150 align:middle line:84% But at first, I only put a handful of water hyacinths 00:05:41.150 --> 00:05:41.930 align:middle line:90% in the pool. 00:05:41.930 --> 00:05:45.020 align:middle line:84% And the red algae made short work of them. 00:05:45.020 --> 00:05:47.390 align:middle line:84% So I put more hyacinths together, 00:05:47.390 --> 00:05:49.940 align:middle line:84% and when I had assembled 30 plants, 00:05:49.940 --> 00:05:56.900 align:middle line:84% a sort of critical mass, the red algae began to recede. 00:05:56.900 --> 00:06:00.620 align:middle line:84% 30 water hyacinths became 3,300, and then 00:06:00.620 --> 00:06:04.190 align:middle line:90% 33,000 water hyacinths. 00:06:04.190 --> 00:06:08.330 align:middle line:84% The water in the pool began to clear and smell cleaner 00:06:08.330 --> 00:06:11.840 align:middle line:84% because water hyacinth digests the worst sorts 00:06:11.840 --> 00:06:14.000 align:middle line:90% of waste and contamination. 00:06:14.000 --> 00:06:16.610 align:middle line:84% Decomposing rodents and dead toads-- 00:06:16.610 --> 00:06:18.915 align:middle line:84% nothing is too vile for the water hyacinth. 00:06:18.915 --> 00:06:21.560 align:middle line:90% 00:06:21.560 --> 00:06:24.650 align:middle line:84% Water hyacinths even removed lead and cadmium 00:06:24.650 --> 00:06:26.630 align:middle line:90% from contaminated water. 00:06:26.630 --> 00:06:32.540 align:middle line:84% I write in appreciation of the lowly water hyacinth, purifier 00:06:32.540 --> 00:06:33.710 align:middle line:90% of defiled water. 00:06:33.710 --> 00:06:36.860 align:middle line:90% 00:06:36.860 --> 00:06:42.140 align:middle line:84% Only the night blooming datura, jimson weed, sacred plant 00:06:42.140 --> 00:06:47.300 align:middle line:84% of the Pueblo priests, mighty hallucinogen and deadly poison. 00:06:47.300 --> 00:06:53.050 align:middle line:84% Only the datura has the power to purify plutonium contamination. 00:06:53.050 --> 00:06:57.410 align:middle line:84% Datura not only thrives in soil contaminated by plutonium, 00:06:57.410 --> 00:07:01.320 align:middle line:84% the datura actually removes the plutonium from the soil 00:07:01.320 --> 00:07:03.200 align:middle line:90% so that the soil is purified. 00:07:03.200 --> 00:07:06.680 align:middle line:84% And only the datura plant itself is radioactive. 00:07:06.680 --> 00:07:09.530 align:middle line:84% The datura metabolizes heavy water 00:07:09.530 --> 00:07:14.510 align:middle line:84% that contaminated with plutonium because for the datura, 00:07:14.510 --> 00:07:16.100 align:middle line:90% all water is sacred. 00:07:16.100 --> 00:07:19.460 align:middle line:90% 00:07:19.460 --> 00:07:22.640 align:middle line:84% Across the West, uranium mine waste 00:07:22.640 --> 00:07:25.340 align:middle line:84% and contamination from underground nuclear tests 00:07:25.340 --> 00:07:30.290 align:middle line:84% in Nevada ruin the dwindling supplies of fresh water. 00:07:30.290 --> 00:07:33.980 align:middle line:84% Chemical pollutants and heavy metals from abandoned mines 00:07:33.980 --> 00:07:38.420 align:middle line:84% leak gold, lead, and mercury into aquifers and rivers. 00:07:38.420 --> 00:07:42.050 align:middle line:84% But human beings desecrate only themselves. 00:07:42.050 --> 00:07:45.470 align:middle line:90% The Mother Earth is inviolable. 00:07:45.470 --> 00:07:48.530 align:middle line:84% Whatever may become of us human beings, 00:07:48.530 --> 00:07:51.710 align:middle line:84% the Earth will bloom with hyacinth purple 00:07:51.710 --> 00:07:55.070 align:middle line:84% and the white blossoms of the datura. 00:07:55.070 --> 00:07:55.970 align:middle line:90% Thank you. 00:07:55.970 --> 00:07:59.320 align:middle line:90% [APPLAUSE] 00:07:59.320 --> 00:08:33.000 align:middle line:90%