UPSC Previous Year Question | Prelims GS | 2019

In the context of which of the following do some scientists suggest the use of cirrus cloud thinning technique and the injection of sulphate aerosol into stratosphere?

  1. Creating the artificial rains in some regions
  2. Reducing the frequency and intensity of tropical cyclones
  3. Reducing the adverse effects of solar wind on the Earth
  4. Reducing the global warming

Answer

Correct Answer

Reducing the global warming

Explanation

Cirrus cloud thinning (allowing more outgoing heat to escape) and stratospheric sulphate aerosol injection (reflecting sunlight) are geoengineering proposals to reduce global warming.

Topics: climate change, environment and ecology, geoengineering, solar/radiation management (cirrus thinning and sulphate aerosols)