An extensive analysis of energy usage and pollution shows that alternative power systems are still a long way behind the conventional ones. Lot of efforts are made to reduce the air pollution from petrol and diesel engines and regulations for emission limits are also imposed in USA and in a few cities of India. In addition to this, all fuel burning systems emit CO2in large quantities and this is more concerned with the Green House Effect which is going to decide the health of earth.

Other sources such as Electric power stations industrial and domestic fuel consumers also add pollution like NOX, SO2 and particulate matters. engines are CO, NOX unburned hydro-carbons (HC) and other particulate emissions. All these are increasing exhaust pollution and particularly in metros as density of these vehicles in metros are very high. In addition to this there is steep increase in the number of two wheelers during the last two decades. With an increase in population and living standard, the transport vehicles as well as car population is increasing day by day. The automobiles play an important role in the transport system.

Alternative fuels for ic engines