Q. Consider the following:
1.Vehicular Emission
2.Low Temperature
3.Direction of the wind
Which of the above factors is/are responsible for air pollution in Delhi?

[A] 1 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: D

All three factors including the geographical and topography of Delhi is responsible for the air pollution in Delhi. Northwesterly winds from Punjab carries particulate matter that causes pollution in Delhi. Low temperatures around winters contribute to high pollution as it restricts dispersion of the pollution. Vehicular emission is also responsible.

Source: The Indian Express