If you Google "phthalates" (if you can spell phthalates), wanting more information about the notion you've heard that many plastic products contain potentially harmful chemicals, two of the first websites that pop up are www.phthalates.com ("Phthalates Information Centre Europe") and www.phthalates.org ("Phthalate Information Center"). Both these reliable-sounding websites feature friendly reassurance that the media is getting it wrong and that, in fact, phthalates, a family of chemical plasticizers used in a boggling variety of everyday...