ACID RAIN

Some substances, such as lemon juice or vinegar, have a characteristic acidic taste. The pH scale is an indicator used to determine the degree of acidity of a substance; on the pH scale distilled water is neutral with a reading of 5.

When the rain water has a degree of acidity lower than 5, it is acid; this means that it contains some dissolved acid substance, generally sulphuric and nitric acid. Such acid forms in the atmosphere from gasses produced by the power stations, industries, and motor vehicles.

Contaminating Acids

Once they are formed, sulphuric and nitric acid return to the earth surface through rain, fog, and snow, or simply by bonding to solid particles that fall to the ground.

Acid rains transmit its acidity to rivers, ocean, and lakes, to villages and cities, to fields and forest. Such acidity impoverishes the nutritional capacity of the soil as it alters the population of the microorganisms. Forest is subjected to the effects of the acidity as well, because the rain and low clouds contains acid particles.

Acid Rain(Click on the picture to have large view)

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