On The Brian Lehrer Show, this is a great interview with immunologist Dr. Margaret Kripke, co-author of the President's Cancer Panel, discusses her work with the M.D. Anderson Cancer Center and " its focus on reducing the environmental risks for cancer" along with American Cancer Society epidemiologist Dr. Michael Thun.
Also, check out Toxic America in which Dr. Sanjay Gupta the documentary Toxic America. The promo spot for it is a bit scary.
And watch part I of the documentary here.