General practitioners are increasingly confronted with environmental health issues. But how do they approach these issues? How are they asked about these topics by their patients? The National Institute for Prevention and Health Education was commissioned by the Directorate General for Health to conduct an ad hoc survey on the opinions and practices of general practitioners regarding environmental health. The survey was conducted by telephone with a representative sample of 752 general practitioners selected at random from the national Cegedim database (Center for Management, Documentation, Information Technology, and Marketing). Although they have not received training in this field, general practitioners place significant importance on environmental health: 93% agree that general practitioners have an important role to play in informing their patients, and 58% report that they often provide preventive advice. They are, in fact, frequently asked by their patients about environmental issues; however, only 55% feel capable of answering them easily; 93% believe that identifying the environmental origin of a disease is difficult to establish. The study’s findings call for training general practitioners in environmental health, better coordination among data producers, and in-depth consideration of the scientific and medical information to be disseminated to practitioners: knowledge transfer, evidence-based data, and summary documents.