project
on : pollution of
air and water
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Air pollution occurs when harmful or excessive quantities of substances including gases, particulates, and biological moleculesare introduced into Earth's atmosphere. It may cause diseases, allergies and also death of humans; it may also cause harm to other living organisms such as animals and food crops, and may damage the natural or built environment. Human activity and natural processes can both generate air pollution.Water pollution is the contamination of waterbodies (e.g. lakes, rivers, oceans, aquifers andgroundwater), usually as a result of human activities. Water pollution is one of many types of pollution which results fromcontaminants being introduced into the natural environment. Pollution causes adverse change. Water pollution is often caused by the discharge of inadequately treated wastewater into natural bodies of water
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