Pollution of air & water-Theory Session-2
In this session teacher has discussed about - pollution of air & water. Sources of fresh water, Water pollution, Causes, Sewage, Industries, Causes, Effects of water pollution, Eutrophication, Temperature change, Case study : Ganga action plan, Portable water, properties of portable water, purification of water, water treatment, purification of water at home, boiling, Use of filters : physical and electrical.
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