Q. With reference to ‘Black carbon aerosols’ consider the following statements:
1.They are produced by the incomplete combustion of fossil fuels and biomass.
2.They have strong light absorption characteristics.
3.They are responsible for increase in the precipitation in the central and the southern Tibetan plateau during monsoons.
Which of the statements given above is/are correct?

[A] 1 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1 and 2 only

Answer: D
Notes:

Explanation –

Statement 1 and 2 are correct. Black carbon aerosols, also known as soot, are produced by the incomplete combustion of fossil fuels and biomass. They have strong light absorption characteristics.

Statement 3 is incorrect. Black carbon aerosols make more water vapour form precipitation in South Asia, and the northward transport to the Tibetan Plateau gets weakened resulting in decreased precipitation in the central and the southern Tibetan Plateau during monsoon.

Source: The Hindu