Minnesota Public Radio slideshow:
Part 1: The science
<Previous1 2 3 4 5 6 7 8 9 10 Next>


Rich Purdy used to work for 3M, evaluating the environmental safety of the company's products, including  Scotchgard. "Everyone in my group had concerns about them," Purdy says of PFOS and PFOA. (MPR Photo/Mike Edgerly)

Rich Purdy used to work for 3M, evaluating the environmental safety of the company's products, including Scotchgard. "Everyone in my group had concerns about them," Purdy says of PFOS and PFOA.

(MPR Photo/Mike Edgerly)
©2014 Minnesota Public Radio : Terms of Use