Mention the sources responsible for air pollution, water pollution, noise pollution, and thermal pollution.

Air pollution – chemical and paper factories, brick kilns, refineries and smelting plants, and burning of fossil fuels in big and small factories

Water pollution - paper, pulp, chemical, textile and dyeing, petroleum refineries, tanneries and electroplating industries.

Noise pollution - Industrial and construction activities, machinery, factory equipment, generators, saws, and pneumatic and electric drills.

Thermal pollution - Wastes from nuclear power plants, nuclear and weapon production facilities, dumping of wastes especially glass, harmful chemicals, industrial effluents, packaging, salts, and garbage.