Introduction Petrol is a liquid obtained from petroleum and used mainly as a fuel for motor vehicles. A fuel is petrol that can be burned (to provide heat or power). When the fuel is burned, it emits complex mixtures of compounds that lead to the formation of smog and other potentially toxic pollutants. Of all the petroleum that is extracted from the earth, about 84% is burned as a fuel (1). Concerns over rising pollution have encouraged …showed first 75 words of 1487 total…

…showed last 75 words of 1487 total…lighter but stronger materials, and electronic integration of vehicle systems will further enhance the internal combustion engine's fuel economy, performance, safety, and emission control in the future. Alternative fuels promise to provide us with cleaner and more reliable energy sources. I believe that ethanol will be a much better alternative fuel than compressed natural gas for use in the future. Ethanol use in the future will increase because of its biodegradable, renewable, and performance qualities.