Civil Services Prep

Prelims 2024 · Environment · Question 30

According to the Environmental Protection Agency (EPA), which one of the following is the largest source of sulphur dioxide emissions?

  1. Locomotives using fossil fuels
  2. Ships using fossil fuels
  3. Extraction of metals from ores
  4. Power plants using fossil fuels

Answer

Power plants using fossil fuels

  • (a) Locomotives using fossil fuels: They emit sulphur dioxide, but their share is much smaller than stationary energy sources. Verdict: Incorrect.
  • (b) Ships using fossil fuels: Marine fuels can be sulphur-rich, but EPA inventories identify a larger source overall. Verdict: Incorrect.
  • (c) Extraction of metals from ores: Smelting of sulphide ores releases SO2, but it is not the largest source in EPA assessments. Verdict: Incorrect.
  • (d) Power plants using fossil fuels: EPA identifies fossil-fuel power plants, especially coal-based thermal plants, as the largest source of sulphur dioxide emissions. Verdict: Correct.
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