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The Search for Clean Air
 This program presents a clear, forceful, and thorough exposition of the problems of air pollution: its causes; its effects on forests, streams, and human health; and the issues involved in correcting the problems. Narrated by Walter Cronkite, the pro...(more details) |
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$169.95 |
| DVD + 3-Year Streaming |
$254.93 |
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$169.95 |
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The Environment: A Historical Perspective
 From the first agricultural settlements, to the industrial revolution, to agribusiness and widespread urbanization, humans have been transforming the environment for thousands of years. But now, with rain forests disappearing at an appalling rate, po...(more details) |
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$79.95 |
| DVD + 3-Year Streaming |
$119.93 |
| 3-Year Streaming |
$79.95 |
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The Last Drop: Is the World Running Out of Water?
 Water shortages contribute to many regional conflicts worldwide. Only two-and-a-half percent is fresh, and it is therefore a precious commodity. This documentary illustrates how the worsening problem of global water shortage leads to regional politic...(more details) |
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$169.95 |
| DVD + 3-Year Streaming |
$254.93 |
| 3-Year Streaming |
$169.95 |
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Organic Cleanup: Microbes and Pollution
 Over 200 years of industrial activity have left the earth with a legacy of pollution and waste. This program looks at how pollution from everyday industrial production and from ecological disasters like the Exxon Valdez oil spill can be cleaned up wi...(more details) |
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$149.95 |
| DVD + 3-Year Streaming |
$224.93 |
| 3-Year Streaming |
$149.95 |
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Fragile Ecosystems
This program looks at three fragile ecosystems, all in danger of destruction from human activity: marshes, the implication of whose destruction on wildlife, water tables, and an increasing number of other aspects of the entire biosphere is only begin...(more details) |
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