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ICSE Class 9 Chemistry Question 7 of 31

Atmospheric Pollution — Question 19

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Question 19

State two natural and two man-made sources of the green house gas – methane.

Answer

Two natural sources of Methane are:

  1. Bacterial decay of vegetable matter releases marsh gas which is mainly methane.
  2. Natural gas associated with petroleum contains about 75% of methane.

Two man-made sources of Methane are:

  1. Natural wet lands and rice paddies
  2. Gas drilling, Coal mining, biomass burning