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

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 of Trifluoroacetic Acid by Dry and Wet Deposition: A Multiyear Analysis in Toronto," was published in the journal Environmental Science & Technology Letters.