Do you know that a gas is present in air which is used by plants to make food but when the amount of this gas is increased in air, then it works as air pollutant.
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Answer:
carbon dioxide
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The gas asked in question is carbon dioxide.
- Plants prepare their food by the process of photosynthesis. For the process they require carbon dioxide and sunlight. The products are starch and oxygen.
- Carbon dioxide is also considered as pollutant as it is the greenhouse gas. It traps heat and hence is responsible for global warming. Increase in carbon dioxide due to human activities has caused problems to environment and hence is considered as pollutant.
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