Delhi ranked world's most polluted major city ahead of Diwali

Delhi has been ranked as the world's most polluted major city on the eve of Diwali, underscoring ongoing environmental concerns in India's capital region. The ranking reflects persistently hazardous air quality levels that have become a recurring challenge for residents and authorities alike.

The timing of the assessment comes as the nation prepares to celebrate Diwali, the festival of lights traditionally observed with significant firecracker displays. Environmental experts have expressed concern that the seasonal festivities will likely intensify air pollution, as the widespread use of firecrackers typically releases substantial quantities of particulates and harmful gases into the atmosphere.

The air quality crisis in Delhi has been a persistent issue, driven by factors including vehicular emissions, industrial activity, and seasonal weather patterns that trap pollutants over the metropolitan area. The convergence of these factors with Diwali celebrations creates conditions for sharply degraded air quality during the festival period.

Authorities have previously implemented measures to mitigate pollution spikes during Diwali, though enforcement of firecracker restrictions remains challenging. Public health officials have urged residents to take precautions, particularly those with respiratory conditions, as air quality is expected to deteriorate significantly during the celebrations.

The situation in Delhi reflects broader air quality challenges across South Asia, where rapid urbanisation and industrial growth have contributed to elevated pollution levels in major cities.