Given below are two statements. In the light of the above statements, choose the correct answer from the options given below.
Statement I:Sulphate aerosols are primary pollutants in the urban environment.
Statement II:Sulphate aerosols have a cooling effect on climate.
ABoth Statement I and Statement II are true
BBoth Statement I and Statement II are false
CStatement I is true but Statement II is false
DStatement I is false but Statement II is true ✓ Correct
Correct answer: (D) Statement I is false but Statement II is true
Explanation
Sulphate aerosols form in the air from oxidation of sulphur dioxide, so they are secondary, not primary, pollutants.
Statement 1 is therefore wrong in calling them primary pollutants.
Statement 2 is correct because these aerosols scatter sunlight back to space.
That scattering produces a net cooling effect on the climate.
The first statement fails while the second holds.
This aerosol cooling has partly masked the full warming from greenhouse gases.
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