The growing attention to the quality of the air in our cities and to reducing greenhouses gases on a global scale are some of the major driving forces behind the development of automotive technologies. Since the extensive use of hydrogen as a vehicle fuel is unlikely to be possible for another 15-20 years, a technology for using natural gas-hydrogen blends in internal combustion engines has been developed. The addition of a percentage of hydrogen (usually 20-30% in volume) to natural gas makes the latter an even “greener” fuel than it already is in terms of pollutant emissions, making it possible to make a considerable further reduction in greenhouse gases, without a significant impact on performance. The use of hydrogen-natural gas blends, based on consolidated technological expertise in natural gas applications, with the intelligent integration of gas cylinders under the floorpan, has led to the development of the ideal “city car”. This concept car has the same roomy interior and luggage compartment as the petrol version, while guaranteeing a significant contribution to reducing CO2 and pollutant emissions. Where hydrogen is available, this approach represents a platform for the rapid  technological transition to the more generalised use of pure hydrogen.