How does river water get polluted? Explain.
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Sewage and waste water: sewage and waste water produced from household is directly released to the fresh water. Chemical fertilizer and pesticides: farmers are used fertilizer and pesticides for their agricultural field to protect their crops. When rains all the chemicals flew into river and get polluted.
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Dirty water containing chemicals is put back in the river. Water used for cooling is warmer than the river itself, and this is also a form of pollution. People are sometimes careless and throw rubbish such as bottles and crisp packets directly into rivers. Pollution kills water plants and animals.
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