I know my time is short. I want to ask Ms. Barker a question, too.
It says here that there are 4,700 human-made substances that have PFAS in them, and I understand the number is growing all the time.
Is it possible to go through the risk management process and look at each individual PFAS to determine whether it is toxic or not, especially given cumulative effects, or is there an argument for these being put together as a class and not allowed, except when they are proven not to be toxic?