Name two adverse effects caused by acid rains.
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Rain water is turned acidic when its pH falls below 5.6. In fact clean or natural rain water has a pH of 5.6 at 20°C because of formation of carbonic acid due to dissolution of CO2 in water. Parts of India such as North East, Coastal regions of Kerela, Orissa, Bihar, and West Bengal have reported decline in fertility of soil due to reduced pH of soil (increased in acidity). Acid rain is the phenomenon of wet and dry acidic deposition.
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