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UPSC Prelims 2022Question 100Environment

Consider the following:
1. Carbon monoxide
2. Nitrogen oxide
3. Ozone
4. Sulphur dioxide
Excess of which of the above in the environment is/are cause(s) of acid rain ?

Options

  1. (a)1, 2 and 3
  2. (b)2 and 4 only
  3. (c)4 only
  4. (d)1, 3 and 4

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