UPSC Previous Year Question | Prelims GS | 2021

Why is there a concern about copper smelting plants? 1. They may release lethal quantities of carbon monoxide into environment. 2. The copper slag can cause the leaching of some heavy metals into environment. 3. They may release sulphur dioxide as a pollutant. Select the correct answer using the code given below.

  1. 1 and 2 only
  2. 2 and 3 only
  3. 1 and 3 only
  4. 1, 2 and 3

Answer

Correct Answer

2 and 3 only

Explanation

Copper smelting releases sulphur dioxide, a major air pollutant, and the slag can leach heavy metals into soil and water. Carbon monoxide in 'lethal quantities' is not the characteristic concern associated with copper smelters.

Topics: environment, environmental impacts of copper smelting, industrial pollution, pollution