The U.S. Federal Trade Commission, which in 1992 issued “Green Guides” for environmental-marketing claims, has published this useful booklet describing how the FTC will apply rules that prohibit “unfair or deceptive acts or practices.” It describes the general rules about making green claims, as well as specific rules related to individual claims, such as “environmentally preferable,” “recycled,” “recyclable,” “biodegradable,” “compostable,” and claims about the recycled content of products or packaging. It also includes information about the use of third-party symbols and eco-labels, and reprints the original FTC guidelines, which also include specific examples of how to use —and not use — environmental marketing claims.