Share of major contributors to Delhi's PM2.5 in winter 2019
The secondary particles had the highest contribution to particle pollution (PM2.5) during winter in Delhi, India in 2019. Secondary particles originate from sulfur dioxide and nitrogen dioxide emissions from vehicles, power plants and refineries. Delhi had often experienced severe levels of poor air quality in recent months. A 15-day plan was proposed in November 2019 to cut down emissions by 17 percent resulting from controlling unpaved roads across the capital city of India.
