A friend of mine recently passed on an article that appeared in the New York Times:
Bisphenol A, or BPA as it is commonly known in the industry is a common plasticizer. It is used in polycarbonates (like Nalgene bottles), as well as food and beverage containers. People are usually exposed to it in the diet, rather than other means, which makes for very small quantities. That said, we are just beginning to be able to measure these levels- down to nanograms per liter in blood serum and breast milk. Recent tools that allow us to make these measurement also help us see what we are exposed to and what effect those small continuous quantities may have on our systems. A good example of a small quantity that we ingest on a regular basis, yet causes noticeable changes are women’s birth control pills. These pills are usually in dosage of milligrams (1o^-3), of which only a fraction is absorbed into the body, yet cause noticeable changes in hormone systems. Chemicals like BPA can also act in this manner and at these levels, we are finding, so we should be concerned. You can also read what the government thinks about BPA here, at the website of the National Institute of Health.
The quality of water and the quality of life in all its infinite forms are critical parts of the overall, ongoing health of this planet of ours, not just here in the Amazon, but everywhere… The hardest part of any big project is to begin. We have begun. We are underway. We have a passion. We want to make a difference.
— Sir Peter Blake (1948-2001)