Automobiles (Automobile, motorcar, or car) are a type of vehicle for passenger transportation. They are propelled by an internal combustion engine. They are a major contributor to air pollution and have a harmful impact on the environment.

The automobile changed the United States, giving people more personal freedom and access to jobs and services. It also created new industries that provided fuel, parts, and other supplies for the cars.

There are many different types of engines that are used to power the cars. These include steam, electric, and gasoline.

A gas-burning engine is the most common and it uses a mix of hydrogen and oxygen to make energy. It has four to eight cylinders that turn the crankshaft in order to make the engine work.

Another type of engine is a diesel engine. It is a very efficient engine and can use much less fuel than other kinds of engines.

The first autos were made of wood or stone, but they were not very fast. They were not as safe and could be dangerous.

Karl Benz invented the automobile in 1885. Other inventors followed him with their own designs.

Henry Ford came after Benz and revolutionized the way that cars were made. He realized that if he put the cars together on an assembly line, he could turn them out faster and cheaper.

The automobile gave people more freedom and it allowed them to go places they would never be able to go on foot or by horseback. It allowed them to do their shopping and go to work and school. It also helped women get jobs that they could do by themselves.