This week on Green Street, Patti and Doug talk about firefighting gear that was supposed to be PFAS-free (but turned out not to be), hazardous mercury vapor emanating from school gymnasium floors, and how men, not women, are responsible for at least half of all fertility problems. Then, in an interview recorded a few years ago, reporters Barbara Laker and David Gambacorta from the Philadelphia Inquirer talk about what they discovered when they started looking at the chemicals in artificial turf fields.