Civil Services Prep

Prelims 2019 · Environment · Question 66

In the context of which one of the following are the terms 'pyrolysis and plasma gasification' mentioned?

  1. Extraction of rare earth elements
  2. Natural gas extraction technologies
  3. Hydrogen fuel-based automobiles
  4. Waste-to-energy technologies

Answer

Waste-to-energy technologies

  • (a) Extraction of rare earth elements: Pyrolysis and plasma gasification are not standard terms for rare earth extraction; that field uses mining, leaching, solvent extraction, etc. Verdict: Incorrect.
  • (b) Natural gas extraction technologies: Natural gas extraction involves drilling, fracking, and related upstream methods, not pyrolysis/plasma gasification. Verdict: Incorrect.
  • (c) Hydrogen fuel-based automobiles: Hydrogen vehicles use fuel cells or hydrogen combustion; pyrolysis/plasma gasification are not automobile technologies. Verdict: Incorrect.
  • (d) Waste-to-energy technologies: Pyrolysis and plasma gasification are thermal processes used to convert municipal/industrial waste into syngas, heat, or electricity. Verdict: Correct.

Answer: (d) Waste-to-energy technologies

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