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He adjective car is used to refer to that which has mobility by itself . The term, par excellence, is used as a noun to name the car .

Cars, therefore, are Motor vehicles that can move without the need for roads or rails. Also called cars or cars , are intended for the transfer of people .

Most cars have engines from internal combustion . In this case, a gas (gasoline or gasoline, diesel or diesel, CNG, etc.) which, when coming into contact with a oxidizing (oxygen), reacts and the combustion . This process generates a release of thermal energy that is then transformed into mechanical energy to promote movement.

In recent years, anyway, cars became popular with electric motor . These means of transport have batteries that store electricity: the electric power Thanks to the motor's action, it becomes mechanical energy.

It is important to keep in mind that there are multiple types of cars. In general, it can be said that cars have a chassis that supports the bodywork ; four wheels with rims and tires ; a engine with gearbox ; a steering wheel for driving; and pedals to accelerate and brake. Of course, many other elements, systems and mechanisms are part of these machines.

Despite the great advantages that cars offer when moving from one place to another, these vehicles usually produce pollutant emissions that affect the environment . That is why there are campaigns that discourage car travel and promote, instead, transfers in bike or in Public transportation (which allow to take many individuals in the same unit).

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