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 ...
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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 ...
A recent analysis by CREA uncovers that secondary particles from coal-fired power plants are the main driver of PM2.5 ...
Experts warn that focusing only on AQI masks the real health risks posed by chronic exposure to fine particulate matter ...
A 2025 Harvard-led study, conducted by researchers from Harvard TH Chan School of Public Health, found that sulfate particles ...
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