As wildfire smoke blankets the East Coast, Air Quality Index and PM2.5 numbers are everywhere. Here’s what they mean. Air Quality Index, or AQI, and PM2.5, particulate matter which measures 2.5 ...

There has been a lot of talk about air quality levels as nearly the entire tri-state area has been engulfed by smoke coming down from wildfires in Canada. But what do all the numbers actually mean?

The Environmental Protection Agency’s emission factor resource, AP-42, is not your only option for developing particulate matter (PM) emission rates. Results of a prominent PM emissions measurement ...

An analysis by the Centre for Research on Energy and Clean Air (CREA) states that a large share of India’s PM2.5 pollution is ...