Daily pollution figures collected from New Delhi reveal that the city’s air is laden with dangerous small particles of pollution. Read how air pollution affects our health. Beijing`s US Embassy sent out warnings in mid-January when a measure of harmful fine particulate matter known as PM2.5 rocketed above 500 in the upper reaches of the measurement scale for the first time this year. This refers to particulate matter less than 2.5 micrometers in diameter believed to pose the greatest health risk as it penetrates deeply into lungs. However for the first three weeks of this year New Delhi’s average daily
