Q. Which of the following is/are the effects of aerosols on climate?
1. They directly reflect sunlight back to space.
2. They indirectly make clouds brighter reflectors.
3. Aerosols have a net cooling effect on climate systems.
4. Human generated aerosols offset the impact of global warming to some extent.
Select the correct answer using the codes given below:

[A] 1, 2 and 3 only

[B] 2, 3 and 4 only

[C] 1, 2 and 4 only

[D] 1, 2, 3 and 4

Answer: D
Notes:

Explanation: The effects of aerosols on climate are

  • They directly reflect sunlight back to space.
  • They indirectly make clouds brighter reflectors. c. Aerosols have a net cooling effect on climate systems.
  • Human-generated aerosols offset the impact of global warming to some extent.

Aerosol

  • An aerosol is a suspension of fine solid particles or liquid droplets in air or another gas.
  • Aerosols can be natural or anthropogenic. Examples of natural aerosols are fog, mist, dust, forest exudates, and geyser steam.

Source: WMO