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Forests are not just collections of growing trees. A forest is a complex environment, home to thousands of intricately interconnected living species. This program explores three aspects of the forest: the amazing process of photosynthesis, by which plants collect solar energy and convert it into essential compounds; the role of forests in global weather and in maintaining the balance of the biosphere; and the threats to our forests. (23 minutes)



 
                

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Copyright date: ©1989




     


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The Search for Clean Air
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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)
 
Principles of Ecology

The principles of ecology establish the relationships that interconnect humans as a biological species with each other and with their environment. This program also considers the Gaia Hypothesis and the view of the planetary ecosystem as a gigantic l...(more details)
 
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)
 
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)
 
Preserving Forests

Every year, millions of acres of forest are destroyed by fire, insects, and overcutting. This program looks at various ways in which forest management and science can help preserve forests: the battle against fire and insect pests; and the attempts t...(more details)
 


See additional titles in Ecology | Plant Biology