In South Asia, Vehicle Exhaust, Agricultural Burning and In-Home Cooking Produce Some of the Most Toxic Air in the World

In 2014, the World Health Organization reported that New Delhi was one of the most polluted cities in the world, with dangerous levels of fine particulate matter pollution, known as PM2.5. Ever since, New Delhi has been synonymous with hazardous air quality.  Over the last few years the air quality level...