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The air quality index measures PM2.5, less than 2.5 microns particles, to determine the intensity of air pollution in cities.

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Last year, 2024, was the warmest year on record for the planet, easily breaking the previous record set just a year earlier.

Protect yourself from poor air quality like smoke pollution, allergies, bacteria, dust, pets and more with our picks for the best air purifier. Laboratory Technical Project Manager Gianmarco ...

New research has found that a complex form of air pollution from Alberta's oilsands has gone largely unreported — and the impacts to downwind habitats are "entirely unknown." The peer-reviewed study, ...

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Other groups also are trying to answer this question. NASA, for example, uses its satellites to assess air pollution, both chronic and during acute events such as what’s happened in L.A. County.

One of NASA's two stuck astronauts got a much welcomed change of scenery Thursday, stepping out on her first spacewalk since arriving at the International Space Station more than seven months ago.