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Essay Galaxy - Acid Rain 12 Acid from the clouds

Lake Barkevatn in Aust-Agder county used to have healthy stocks of trout and perch. As a result of acid rain, the trout stock died out in the mid-1970s and the perch stock at the beginning of the 1980s. · Precipitation that is polluted by sulphur dioxide (SO2) and nitrogen oxides (NOX) is known as acid rain. · Acidity is measured in pH units: the lower the pH, the more acidic the substance. Unpolluted rain has a pH of roughly 5.6, but there are natural variations. Acid rain and snow, with a pH of about 4.4, has fallen in southern Norway for many years, causing serious environmental damage in many areas. The severity of the damage depends more on the total input of sulphur and nitrogen than on the acidity of each raindrop. · More than 90 per cent of the acid rain that fa....

Number Of Pages: 5 Number Of Words: 1332

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