Major cities in India have been installing outdoor air purifiers in an effort to curb the air pollution issue in India. But research points out that the air quality in the country has been steadily decreasing. Gadgets 360 talked to air quality researchers and manufacturers of outdoor air purifiers to find out why.

source https://gadgets.ndtv.com/science/features/outdoor-air-purifiers-india-wayu-delhi-bengaluru-mumbai-ceew-cse-2587324#rss-gadgets-all