A chemical found in hard plastics -- such as CD cases, baby bottles, food-storage containers, and even electronics parts -- has been loosely linked to incidences of breast cancer. Popular opinion cautions that if we were not worried about this news yesterday, we should not be worried about it today -- because studies are preliminary and nothing is definitive at this point. But there are definitely two sides to the debate over how harmful these hard plastics may be.

The chemical in question -- a pseudo-estrogen called bisphenol-A (BPA) -- appears to be absorbed by breast tumor cells, according to a new study published in the August 28 issue of Chemistry & Biology. Previous studies have linked small exposures of BPA to prostate abnormalities in mice that suggest a link between the plastic chemical and human prostate cancer. Some studies even theorize that embryonic and fetal exposure might influence mental retardation and birth defects. And because this pseudo-estrogen is a synthetic material that in human cells can trigger estrogenic effects, breast cancer now comes up as a disease that may result from this questionable chemical.

Critics say that average levels of the chemical found in urine is infinitesimally small -- about one part per billion. Some say the results of this research come from in-vitro studies that one expert says can never fully explain human disease. Yet the real crux of the matter, according to another expert, is that we are surrounded by all sorts of chemicals that are pseudo-estrogenic -- not just BPA -- and it's the cumulative effects that we do need to worry about.

Prostate cancer has been on the rise for the last thirty years. A small but growing group of scientists are beginning to prove with research what environmentalists and activists in the cancer community have been saying for some time -- the link between environmental toxins that mimic estrogens in the body and reproductive cancer is not coincidental. University of Illinois at Chicago and the University of Cincinnati researchers have just completed a study that shows a direct link between the chemical, bisphenol A or BPA -- that leaks from plastic products we use in daily life -- to the development of prostate cancer in later life.

According to the researchers, these findings could have major implications for human disease, and could, at least in part, explain why the prostate cancer rate has surged. Used for about half a century, BPA is a key component in the manufacture of polycarbonate plastic and is one of the world's most widely used industrial chemicals. Unlike carcinogenic chemicals that can cause profound damage to DNA and trigger cancer, BPA seems to cause subtle changes that are passed from one generation to the next generation. It all starts in the womb. To read more, go here.