Twenty died in 1950 president harry truman convened

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Unformatted text preview: the surface air are trapped. 0% US Census Bureau, Statistical Abstract of the United States, 2000 11 67 Temperature Inversion: The Donora Valley 68 Water Pollution There are six types of water pollutants In October 1948, a temperature inversion in the town of Donora, PA trapped pollutants from nearby steel and zinc smelters. After 5 days, almost 6,000 people were severely ill. Twenty died. In 1950 President Harry Truman convened the first national air pollution conference, citing Donora as an example of the need. The kind of smog that caused the Donora Valley disaster is sometimes called a “sulfurous” smog (even though other chemicals, including fluorine, were involved). – – – – – – Biodegradable wastes (sewage) Plant nutrients (fertilizers, phosphates) Heat Sediments Hazardous and toxic chemicals (biocides) Radioactive wastes There are three main sources of water pollution – Water-using industries (mostly point source) – Municipal/sewage (point and non-point) – Agriculture (mostly non-point); 69 Industrial Water Pollution 70 Oil Spills About half the water used daily in the US is used by industry. Industrial activities routinely discharge a variety of chemicals (and heat) into our waters. Industrial pollutants include – PCBs (polychlorinated biphenyls) – Radioactive waste – Petrochemicals • In 1998 there were 8,315 recorded oil spills in US waters; over 885,000,000 gallons were spilled. • In 2000 the Bureau of Transportation Statistics recorded 8354 oil spills totaling 1,431,370 gallons. • In 2001 the US Coast Guard recorded 7,559 oil spills totaling 854,520 gallons, and 105 chemical spills totaling 271,429 gallons. 1 barrel of oil = 0.146 tonnes of oil – Thermal pollution 4,500,000 tonnes = 30,784,500 barrels 71 Mining Acid mine drainage, Pennsylvania Rainwater reacts with mine waste to produce a variety of toxic pollutants Mine waste is a significant problem in many parts of the country – Kentucky, Tennessee and West Virginia (strip mining for coal) – Utah, Nevada, New Mexico (gold, silver, lead, copper, uranium mi...
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This note was uploaded on 12/16/2010 for the course GEOG 102 taught by Professor Osborn during the Fall '10 term at San Diego State.

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