Public health groups are suing the Environmental Protection Agency (EPA) over its approval of a Pfas “forever chemical” insecticide that industry research found likely reduces testicle size, lowers sperm count and harms the liver in rats.

The pesticide, isocycloseram, is used on food crops and could especially threaten children and developing fetuses, but the EPA did not factor those risks into its safety assessment, said Nathan Donley, environmental health science director with the Center for Biological Diversity, a plaintiff in the suit.

The lawsuit marks the latest flare-up in an ongoing controversy over the use of forever chemicals in pesticides, which public health advocates discovered under the Biden administration, and has accelerated under Trump.