Pollution from cars is the amount of emissions produced by cars driving on different roads. Increasing levels of air pollution from these cars, especially passenger cars are a real threat to the indigenous population and environment.In India, commercial vehicles and passenger cars are supposed to help limit environmental pollution. Today, as people's awareness on environmental pollution is increasingly being collected and weighing measures to combat pollution in particular manufacturers of passenger cars cars.Indian as Maruti Suzuki, Hyundai , Honda and continuously work to greener technologies to help keep the environment clean and provide a green world to its valued customers and others at home or even cars.Common car PollutantsThe main component responsible for the pollution of cars the combustion engine. The combustion engine in a moving car is a mixture of air and fuel is burned in the engine cylinders. The gasoline used in this mixture of hydrocarbons, carbon monoxide and nitrogen oxide. The amount of unburned gases in the combustion gases pollutants.Car contamination is higher if the car was not tuned and well maintained. The vehicle must be regularly inspected and maintained to sustain the levels of pollutant emissions from vehicles minimum.Key have a negative impact on the environment: Carbon Monoxide: Carbon monoxide is a poisonous gas produced in the internal combustion engine. More from this toxic gas is produced when the air-fuel ratio is low. The main factor responsible for increased production of carbon dioxide is the irregular maintenance of motor vehicles. He also said that cars produce about 90% of the total carbon content which majorly contribute to the pollution of the environment. Nitrogen oxide: nitrogen reacts with oxygen atoms in high pressure and high temperature. Both atoms react together to form nitric oxide, which is one of the most harmful gases to the environment and humans. These are also considered to contribute to the formation of acid rain and 72% to global warming. Hydro carbon: These are composed of hydrogen and water and are produced during combustion. Composed of different molecular weight materials, often pose a significant risk for long-term solutions to human and environment.Long modern vehicles use catalysts to reduce emissions from passenger cars. Currently the situation is gradually absorbed by the converters, but long-term solutions must be designed for a safer world environment.Innovative new technologies have been the way for alternative fuels that produce fewer emissions. The recent trend includes the use of liquefied petroleum gas (LPG) and Compressed Natural Gas (CNG). For the future, automakers also looked at the water and air as possible sources of energy for driving cars.