How is the quality of air affected? How does it harm human beings?
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Explain how the total mass of substances remain unchanged during a chemical change
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Explain how the total mass of substances remain unchanged during a chemical change
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Quality of air is affected by various sources like factories, industries, vehicular emissions, chemicals etc........This decreases the rate of free oxygen and replaces it with harmful chemical emmisions so this intern causes various diseases, respiratory problems, etc....... to human beings...
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