The effects of chlorofluorocarbons on the environment and ways in which their emission can be eliminated or limited. The report on the "Effects of chlorofluorocarbons on the environment and ways of limiting or eliminating their emissions" was prepared at the time by an opposition deputy, Mr Robert Galley, and a government senator, Mr. Louis Perrein. Presented on the eve of the London Conference on the revision of the Montreal Protocol on preserving the ozone layer, this is the first report by the Office to have been fully translated into English. During its preparation, the two rapporteurs met all of the world’s leading specialists on the subject, without exception, and were able to participate in the inter-parliamentary conference on the environment organised in Washington by the American senator Albert Gore in the spring of 1990. The conclusions reached by the Office can be summarised under three headings: 1. The scientific evidence calls for tougher action; 2. It is possible to do without CFCs; 3. It is indispensable for developing countries to join in the efforts to restrict and eliminate emissions of halogen compounds. In the conclusion of the report, the Office sets out a list of recommendations that the Minister for Research has adopted and has undertaken to implement.