LYCOS RETRIEVER 
Pollution: Years
built 192 days ago
Land pollution ... involves the accumulation of chemicals in the ground. Modern agriculture, which has grown dependent on chemical fertilizers and chemicals that kill insects, has introduced substances into the soil that kill more than pests. For many years the chemical DDT was routinely sprayed on crops to control pests. It was banned when scientists discovered that the chemical entered the food chain and was harming wildlife and possibly humans.
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Light pollution is a type of pollution. It is defined as “any adverse (or bad) effect as a result of man-made lights.” Usually, this means to much light. Several species, including plants and humans, are badly affected by light pollution. Most people have never heard of light pollution, and those who have usually don’t care, or do anything about it. Light pollution costs americans billions of dollars every year.
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Radnor Township in Pennsylvania has announced with great fanfare "that it will purchase 62 percent of its electricity from pollution-free, wind-generated electricity, making it the nations leading wind energy purchaser among municipalities" (PRNewswire, February 26, 2003). The Township will purchase 1,400,000 kilowatt hours per year over three years from a wind farm near Mt. Storm, West Virginia.
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