When Living on Earth first began 20 years ago, some new studies had emerged suggesting that breast cancer may be linked to pesticides such as DDT. Reporter Tatiana Schreiber produced a documentary for LOE on the issue and one of the researchers she interviewed was Dr. Mary Wolff of Mount Sinai School of Medicine. Host Steve Curwood catches up with Dr. Wolff to find out what has been learned since the controversial results of her early research.