Question

'Methane is an air pollutant that causes Greenhouse effect.' Name three sources of this gas.
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Answer 1

Three sources of Methane Gas:

1. Cattles-dung.
2. Coal-mine
3. Stangnant ponds with rotten bio-elements like tree-leaves, dead algea etc.

Hope it helps...

Answer 2

hi guys

Explanation:

carbon dioxide ,ozone,nitrous oxide