A new study conducted in Kolkata shows that the toxicity value of PM2.5 experiences a sudden jump when the pollution reaches around 70 µg m-3. PM 2.5, or particulate matter with a diameter of 2.5 micrometers or smaller, is a significant air pollutant posing serious health risks, including respiratory and cardiovascular problems, and is a … Continue reading Kolkata Air Pollution Crisis Linked to Biomass Burning