What Are We Doing to the World?
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Part I- Discusses the unfavorable changes which man is bringing about in his environment. Describes air pollution in major cities, pollution of lakes, and the "greenhouse effect" - the result of an increase of temperature and carbon dioxide in the air. Part II - The effect of pollution on ecological balance. Studies the Hubbard Brook National Forest experiment to show the result of a destroyed biology. Shows effects of chemical fertilizers in accelerating the growth of algae. (21st Century series)
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