Recent research has unveiled a startling correlation: older Americans exposed to polluted air face a heightened risk of ...

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 ...

New research shows ammonium sulphate makes up nearly one-third of Delhi’s PM2.5 pollution and poses serious health risks.

A big new study, with researchers from Harvard and CREA, just uncovered something troubling about Delhi’s air: almost a third ...

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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 ...

A recent analysis by CREA uncovers that secondary particles from coal-fired power plants are the main driver of PM2.5 ...

A 2025 Harvard-led study, conducted by researchers from Harvard TH Chan School of Public Health, found that sulfate particles ...

Delhi recorded its worst air quality for the month of December since 2018, with an average AQI (Air Quality Index) of 349, ...