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?

In the context of which of the following do some scientists suggest…

Answer

(a) Creating artificial rains — Incorrect. Artificial rain uses cloud seeding (like silver iodide), not cirrus cloud thinning or stratospheric sulphate aerosol injection.
(b) Reducing tropical cyclones — Incorrect. These are climate geoengineering ideas aimed at altering Earth’s radiation balance, not established cyclone-control techniques.
(c) Reducing adverse effects of solar wind — Incorrect. Solar wind effects relate to Earth’s magnetosphere, not to cloud thinning or sulphate aerosols in the stratosphere.
(d) Reducing global warming — Correct. Cirrus cloud thinning and stratospheric sulphate aerosol injection are discussed as solar radiation management/geoengineering methods to reduce warming.