"Green chemistry" isn't just a slogan. It is a full employment concept for government regulators and private-sector lawyers that will have the effect of costing American business billions even as it produces minimal benefits for consumers. Just like "global warming" and "clean energy," "green chemistry" is a phrase containing worlds within it, almost all of them dangerous or downright deadly to market-driven innovation and productivity. We are entering the third decade of the "green chemistry" movement, and a handy guide to its history is in Katharine Sanderson's article in the Jan. 6 issue of Nature. The would-be regulators of all...