Firecrackers Drive Most of Delhi's Post-Diwali Pollution, Study Finds

A study has found that firecrackers were responsible for about 80% of the pollution recorded in Delhi after Diwali. The assessment covered the post-festival period, with a specific focus on a November 9 measurement window. Vehicular emissions contributed only 6.9% of PM2.5 pollution during that window, a far smaller share than firecrackers. Secondary inorganic aerosols accounted for 5% and secondary organic aerosols for 4.5% of PM2.5 levels. The findings point to fireworks as the dominant source of the city's post-Diwali air pollution spike.
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