When Toronto paused for COVID, a key 'forever chemical' rapidly declined

PHYSorg
Jan 29, 2026, 8:34 pm116 pts
A new study out of York University has found that the amount of atmospheric trifluoroacetic acid (TFA), the tiniest forever chemical, significantly declined in Toronto during COVID in 2020, which researchers say is good news for the world's ability to mitigate it in the future. The paper, "Atmospheric Removal…

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When Toronto paused for COVID, a key 'forever chemical' rapidly declined

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