India, Oct. 22 -- New Delhi: India recorded the world's highest annual average concentration of PM 2.5 exposure in its air in 2019, according to the State of Global Air 2020 (Soga 2020) report released on Wednesday, extending to a decade the rising streak of the common air pollutant that has emerged as a respiratory health risk in the Capital and other cities.

According to the report, India was followed by Nepal, Niger, Qatar and Nigeria in exposure to PM 2.5, which are fine, inhalable particulate matter with diameters that are generally 2.5 microns, or about 30 times smaller than a strand of human hair. India has been recording an increase in PM 2.5 pollution since 2010, said the report. The Central Pollution Control Board (CPCB)'s 2019 ...