TFA pollutes global rainwater

Trifluoroacetic acid (TFA), a chemical byproduct, is now found in nearly all rainwater globally. TFA originates from the breakdown of PFAS chemicals in pesticides and landfills, and from fluorinated gases in refrigerants and air conditioners. It is highly soluble and easily travels through the water cycle. While the full health effects of TFA are unknown, animal studies suggest potential harm. Some industry groups dispute the risks and classification of TFA, but many scientists argue it is entirely man-made and poses a significant environmental concern.