Debate  over bisphenol A (BPA) is one of the most contentious environmental  health issues faced by government and industry. Traces are found in the bodies  of nearly all Americans tested, and low levels  similar to amounts that can  leach from infant and water bottles  mimic estrogen and have caused genetic  changes in animals that lead to prostate cancer, as well as decreased  testosterone, low sperm counts and signs of early female puberty, according to  more than 100 government-funded studies.