Automobiles are four-wheeled vehicles designed primarily for passenger transportation and powered by an internal-combustion engine using a volatile fuel. They are often distinguished from trucks/lorries, vans, buses, and other vehicles devoted to carrying cargo. The term automobile derives from Ancient Greek autos (meaning “self”) and French mobile (“moving”).

In the late 19th century, the automobile served a predisposition in the United States toward freedom of movement and action, as well as a need to escape urban congestion. The car also spurred new industries and jobs in manufacturing cars, as well as roads, traffic lights, and refueling stations.

Despite their many advantages, automobiles are not without drawbacks. They are a major source of pollution, particularly in cities where they generate much more exhaust than their small size would suggest. In addition, when too many automobiles try to go the same way at the same time, they cause traffic congestion and delay everyone’s travel. This is why many cities have developed other forms of transport such as buses, trains (steam-powered, diesel-powered, or electric), trams, and subways. They can get people where they want to go more quickly and at a lower cost than by automobile, and their combined pollution is less damaging to the environment than the exhaust from one single automobile. However, automobiles can still be dangerous if they are driven recklessly or when drivers do not pay attention to the road and other vehicles. These issues can lead to accidents, injuries, and deaths.