WASHINGTON, Jan. 7 -- A coalition of scientists has issued a public comment letter to the U.S. Environmental Protection Agency (EPA), emphasizing the urgent need for accurate definitions of per- and polyfluoroalkyl substances, commonly known as PFAS. The group advocates for definitions that reflect scientific understanding, without political interference, to address the public health and environmental risks posed by these persistent "forever chemicals." PFAS are extensively used in various cons more ST