How does river water get polluted? Explain
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Chemical waste from factories is sometimes dumped into rivers and lakes, or directly into the ground. Pesticides (chemicals that kill insects) applied to farmland enter surface water and groundwater, often in large quantities. Some pollutants slowly break down into harmless chemicals.
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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. ... Polluted water also carries diseases.
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