Which one of the following processes does not pollute air?
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Use of Cosmetics
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Photosynthesis
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Burning of Dead woods
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Use of insecticides
B
Correct answer
Explanation
Photosynthesis is the only process listed that purifies air rather than polluting it. During photosynthesis, plants absorb carbon dioxide and release oxygen, improving air quality. The other options - cosmetics (contain VOCs), burning dead wood (releases smoke and particulate matter), and insecticides (chemical pollutants) - all contribute to air pollution in various ways.