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Which of the following are some important pollutants released by the steel industry in India?

  1. 1.Oxides of sulphur
  2. 2.Oxide of nitrogen
  3. 3.Carbon monoxide
  4. 4.Carbon dioxide.
  1. A.1, 3 and 4 only
  2. B.2 and 3 only
  3. C.1 and 4 only
  4. D.1, 2, 3 and 4
▶ Answer & Explanation

Correct answer: D. 1, 2, 3 and 4

The steel industry is a significant source of various air pollutants. During the metallurgical processes, high temperatures and chemical reactions lead to the release of sulfur dioxide from the combustion of fuels and raw materials. Nitrogen oxides are formed when atmospheric nitrogen reacts with oxygen at high temperatures. Carbon monoxide is a product of incomplete combustion, which is common in industrial furnaces. Furthermore, the extensive use of fossil fuels and the overall process also contribute to the emission of carbon dioxide, a major greenhouse gas.

Source: UPSC gs1 2014

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