Consider the following statements regarding mercury pollution: 1. Gold mining activity is a source of…

Consider the following statements regarding mercury pollution: 1. Gold mining activity is a source of mercury pollution in the world. 2. Coal-based thermal power plants cause mercury pollution. 3. There is no known safe level of exposure to mercury. How many of the above statements are correct?
  1. Only one
  2. Only two
  3. All three
  4. None

Solution

Per the official UPSC key, the answer is D. All three statements are scientifically correct — most coaching keys marked C. UPSC officially marked D.

Asked in: UPSC Prelims 2023

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