Delhi Chief Minister Arvind Kejriwal, who has previously blamed stubble-burning in Punjab for the capital’s poor air quality, asked for patience on Friday. There is no easy — or simplistic — explanation for this phenomenon: air pollution in Delhi, and indeed throughout the Indo Gangetic plains, is a complicated phenomenon influenced by a number of causes. During the southwest monsoon, the predominant wind direction is easterly. However, once the monsoon has passed, the prevailing wind direction shifts to the north-west. When this occurs, higher concentrations of contaminants in the air hang closer to the surface, causing AQIs to worsen.

Source: Indian Express November 04, 2022 15:30 UTC