Consider the following statements regarding aerosols.

1. Aerosols use has been suggested to reduce the incoming sunlight
2. They can change cloud properties.

Select the correct statement using the codes given below.
a) 1 only
b) 2 only
c) Both 1 and 2
d) None of the above

Ans-[C] 

Explanation – An aerosol is a colloid of fine solid particles or liquid droplets, in air or another gas. Aerosols can be natural or artificial. Examples of natural aerosols are fog, forest exudates and geyser steam. Examples of artificial aerosols are haze, dust, particulate air pollutants and smoke. Statement 1 is correct. This technique is known as stratospheric aerosol injection. It involves spraying fine stratosphere fine, light colored particles designed to reflect part of the solar radiation before it reaches and warms the earth. Aerosol can change cloud properties. It was published in IPCC report. You can read about it here