Carbon monoxide is main pollutant of

Options :
  1. water
  2. air
  3. noise
  4. soil
Answer and Explanation :-

Answer: Option 2

Explanation:

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Why I Am HappyNow has come, an easy time. I let it roll. There is a lake somewhere so blue and far nobody owns it. A wind comes by and a willow listens gracefully. I hear all this, every summer. I laugh and cry for every turn of the world, its terribly cold, innocent spin. That lake stays blue and free it goes on and on. And I know where it is.
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