Question

Mention any four sources that make our environment dirty.​

Answer 1

Examples of point sources include sewage treatment plants; oil refineries; paper and pulp mills; chemical, automobile, and electronics manufacturers; and factories.

Answer 2

The biggest causes are vehicular pollution, industrial emissions, thermal power plants, construction dust, waste burning and millions of poor households' use of cheap and dirty fuels such as wood and cow-dung for cooking.

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