. >> bpa is of concern, bbecause it lookoks like an estrogen. . and it's s been n to have a weak esestrogenic effect. . and so if you're expod to a c chemical that m might interfere e with your hormone levels, in this case your estrogen, that can have effects, particularlyly if it happens during development. >> and there is preliminary data that says that it may in fact directly--an early life exposure might directly i increase the risk of breast cancer in animals. >> if there are chemicals that affect the development of the b breast even beforee birth, , if there are chemicacas that cause breast tumors in animals, these are chemicals that we want to be worried about and start thinking about reducing exposure. >> in addition to breast cancer, bpa may be assocociated with genetic damage and a wide variety of reproductive, metabolic, behehavioral, and developmental p problems. it's one of the top industrial chemicals in the world. about 6 billion pounds of bpa are produced globally each year, earning manufacturers a profit of some $8 billion. >> we'