If you've ever wondered why the public health system in this country is a mess, this book will show you. Basically, the burden of proof to demonstrate that a given chemical is harmful is on the victims or the underfunded EPA, who often, for both financial and legal reasons, have to depend on tests and information given by the chemical companies themselves. If that's not the fox guarding the henhouse then I don't know what is.
The book examines in depth four chemicals : atrazine and alachlor (both pesticides), perchloroethylene (used in dry cleaning), and formaldehyde, which is used in many products, particularly wood-related ones. The companies that make these products include some of the largest and most powerful corporations in the world including du Pont, Monsanto, Ciba-Geigy, Dow Chemical, Borden (yes, Elsie the cow is poisoning you) and Georgia-Pacific. They have armies of lawyers. They have many scientists working directly for them, and many others in academia working indirectly through studies that they fund. They also have bigtime PR firms who hammer home the message that (to quote the title of a related book) Toxic Sludge is Good for You.
Even in the few cases where a chemical actually is banned, the taxpayer then has to make up the difference. We can all be poisoned but heaven forbid that one of these huge corporations should lose a little profit !