c.c. recommends 2 we test our children for lead. that's our most vulnerable population.t i would say if you're concerned, go talk to your doctor about it. host: we're going to take calls but before i do, i want to ask you about pfas. there was another action by the e.p.a. that proposed that nine pfas, these are call forever chemical, bed hazardous substances. first, start by explaining what they are, why they're called forever. guest: so they're called forever chemicals because these " compnd bonds, they're the strongest bonds in chemistry. we have used them for decades in te teflon, gortex, anything that's stain repellent,■o repellent, has these chemicals in them. we've used them for a long time. they're now in our drinking water systems, our ground water, our surface water. theyeô everywhere. the e.p.a. now by making them hazardous chemicals is now essentially asking the polluters to pay because we as a society right now are tr■v tt them out of our environment, by asking our utilities to do their work. our water utilities. there are new regulations going in place that'