This article presents compressed natural gas for vehicles (CNG), which can provide considerable advantages both as an alternative fuel and as a clean fuel. These assets are not only economic but also technical. The first part deals with what is at stake in developing natural gas as a motor fuel. The first countries to use CNG were those with natural gas resources in their subsoil. Today, with a large number of countries having to cope with growing concern about increasing urban pollution, natural gas is also seen as a clean fuel that can help cut vehicle pollutant emissions dramatically. In the second part a brief technical description is given of CNG stations and vehicles, with the aim of acquainting the reader with some of CNG＇s specific technical features as compared to gasoline and diesel oil. Here CNG technologies are seen to be very close to the more conventional ones. Finally, the last part is devoted to ongoing action which will enable CNG to be developed in France and in Europe: research programs, cost reductions in this industrial sector, regulatory action, communications, etc.