Water is an important natural resource for plants, humans and animals. Only one percent of water on Earth is freshwater, that can be used by humans and animals. The quality of water is pure when there is no foreign substance found in the water bodies. But unfortunately, the quality of water is deteriorating in India. As the industries in India are increasing, water pollution has also increased this is due to the waste materials(solid and liquids) dumped into the water bodies. Also, because of agricultural activities a large quantities of insecticides, pesticides and fertilizers are found in the water bodies. The sewage system in the urban areas also, leads to water pollution. All these waste materials deteriorates the quality of water and make it unhygienic and unsafe to use. In India Yamuna and Ganga are the most polluted rivers due to the domestic, agricultural and industrial activities.
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