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Air pollution occurs when harmful or excessive quantities of substances including gases, particulates, and biological molecules are introduced into Earth's atmosphere.

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Water pollution is the contamination of waterbodies, usually as a result of human activities. Waterbodies include for example lakes, rivers, oceans, aquifers and groundwater. Water pollution results when contaminants are introduced into the natural environment

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Noise pollution, also known as environmental noiseor sound pollution, is the propagation of noise with harmful impact on the activity of human or animal life. The source of outdoor noise worldwide is mainly caused by machines, transport and transportation systems.

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Here are some of the natural and manmade sources that cause air pollution

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Man made and natural activities that cause water pollution.

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Some common causes of noise pollution

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Based on the causesHow would you control air pollution

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Based on the causes, How would you control water pollution?

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Based on the causes, How would you control noise pollution?

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Of the given types of  pollution, which is the easiest to control?