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Extent of Resources at Risk*

By B. Materials, At Risk, B. Aquatic and Resources At Risk


Scientists are concerned that acid deposition may be damaging substantial numbers of U. S. and Canadian lakes and streams. As part of its assessment of trans-ported air pollutants, OTA contracted with The Institute of Ecology (TIE) to: ● describe mechanisms by which acid deposit ion may be affecting sensitive 1akes and streams; ● providc an inventory of Eastern U.S. lakes and streams considered to be sensitive to acid deposit ion; ● estimate the number of lakes and streams in these scnsitive regions that have been affected and/or altered by acidic deposition; and ● examine three scenarios for future sulfate deposition levels to the year 2000, and project effects on sensitive aquatic resources. Because of ’ scientific uncertainties and data limit ations, none of these tasks can be addressed at this time with a high degree of accuracy. Each of ’ these topics i

Year: 2009
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