According to State of Global Air Report 2019, in 2017, annual PM2.5 (particulate matter that have a diameter of less than 2.5 micrometers) exposures were highest in South Asia, where Nepal (100 µg/m3), India (91 µg/m3), Bangladesh (61 µg/m3), and Pakistan (58 µg/m3) had the highest exposures. Airpocalypse III, is the report released by Greenpeace, which analyzed air pollution data of 313 cities and towns for the year 2017.Of these 241 (77%) had PM10 (particles that are 10 micrometers or less) levels beyond the National Ambient Air Quality Standards (NAAQS).
Frontier Report of UN- It includes chapter on nitrogen pollution. It ....