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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 |
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$169.95 |
| DVD + 3-Year Streaming |
$254.93 |
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$169.95 |
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Who Found the Missing Link? (Uranium)
 Lise Meitner accomplished a lot of firsts: she was among the first women admitted to the University of Vienna, one of the first to study science, one of the rare exceptions to the rule that barred women from admission to German universities, to be ta...(more details) |
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$99.95 |
| DVD |
$99.95 |
| DVD + 3-Year Streaming |
$149.93 |
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$99.95 |
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Acid Rain
 A history and explanation of the history of acid rain and the dangers posed by industrial carbon and sulfur emanations that interact with airborne moisture to produce acid rain. The program provides chemical definitions, illustrates geological and me...(more details) |
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$99.95 |
| DVD |
$99.95 |
| DVD + 3-Year Streaming |
$149.93 |
| 3-Year Streaming |
$99.95 |
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Preserving the Rain Forest
Humans came out of the African forest, and continue to live in equilibrium with the tropical forest in Africa, Brazil, and elsewhere-hunting, fishing, collecting plants. Trouble only begins when humans begin to cultivate plants in the forest, cutting...(more details) |
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The Environment
Every day, in every way, humans seem to find new ways to despoil our planet. This program takes a global look at such problems as PCBs and acid rain. In the end, breathtaking imagery enables us to visualize the meaning of the greenhouse effect and de...(more details) |
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