This week on Green Street, Patti and Doug talk about the EPA’s ban on two toxic chemicals (finally!), the failure of the worldwide plastic treaty in South Korea, and the promise and problems associated with new types of biodegradable plastic.Then Kate Donovan of the NRDC and Dr. Charles Moon of Mount Sinai School of Medicine give an overview of the chemical class known as PFAS and how consumers can reduce their exposure to these toxic “forever” chemicals.