Multiple choice

Which of the following are the sources of mercury pollution?

  1. Coal-fired power plants
  2. Supersonic jets
  3. Cement kilns
  4. Trash incinerators

  1. 1, 2 and 3 only

  2. 1, 3 and 4 only

  3. 1 and 3 only

  4. 1 and 4 only
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Coal-fired power plants are the largest source of mercury pollution as mercury exists naturally in coal. Cement kilns are used for the manufacture of hydraulic cement and coal, which is a major source of mercury, is used to fuel the cement-manufacturing process. Incinerator is waste treatment process that involves the combustion of organic substances contained in waste materials. Supersonic jets release nitrogen oxide, and not mercury.

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