This week, a Bloomberg news story opened with this curious note: “If you happen to buy a cup of coffee in California and it comes with a cancer warning, don’t panic -- it’s just the law.” That law, Proposition 65, has been the bane of California businesses for over 30 years. It requires warnings on products and places which may expose consumers to chemicals “known to the state of California” to cause cancer, birth defects, or reproductive harm. Trouble is, California apparently “knows” more than the EPA, FDA, NIH, and the litany of toxicologists who study harmful substances for a living