Toyota?s CNG powered Camry Hybrid

Natural gas also produces lower particulate emissions, nitrous oxide (NOx), carbon monoxide (CO), carbon dioxide (CO2) and non-methane organic gases (NMOG), and less CO2 per unit of energy when compared with gasoline. In addition, it has a higher flash point (ignition temperature) than gasoline, can run at a higher compression ratio and is quickly dispersed into the atmosphere, should a leak occur.