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Air pollution declined in Europe and China in 2023 – UN

GENEVA, Switzerland — Fine particle air pollution declined in Europe and China last year as emissions linked to human activity dropped, the United Nations said in a report published on Thursday.

Nanoparticles known as PM2.5 — due to their size smaller than 2.5 micrometers in diameter — pose a severe health risk if inhaled over long periods of time as they are tiny enough to get into the bloodstream.