About a third of 2019’s asthma cases related to prolonged exposure to PM2.5, global study finds
New Delhi, Oct 28 (PTI) About a third of global asthma cases reported in 2019 were related to prolonged exposure to pollution due to PM2.5 or fine particulate matter, a finding that researchers said provided “sufficient evidence” on the link between air pollution and asthma. The review of 68 studies conducted from 2019-2023 across 22 countries, including South Asian ones, showed that for every 10 micrograms per cubic metre increase in PM2.5, the risk of developing childhood or adult asthma increases by over 21 per cent. The respiratory condition is marked by recurring symptoms of wheezing, coughing and breathlessness and