Automobiles are vehicles that can move on their own, without being powered by a horse or another animal. They usually have four wheels and are powered by an internal combustion engine (also known as a motor) or an electric motor. Most of them use a fuel such as gasoline, diesel or kerosene to run the motor. The engine then drives the wheels through a transmission. Automobiles can be made in different shapes, sizes and colors. Some types are built for specific purposes. For example, crane cars are used at construction sites and fork-lifts in warehouses. There are also special automobiles that rescue people in case of accidents or emergencies, such as fire engines and ambulances.
Automobiles have revolutionized the way that humans live and work. They allow us to travel long distances quickly and easily. They give people more freedom to choose where they want to live, and they can visit places in the country or the world that they might not be able to reach by other means. They give many people a sense of power and freedom that they had never before experienced.
At the same time, automobiles have given rise to new problems. Millions of people die in car accidents every year. The pollution that they cause is a major problem for the environment and many cities have traffic jams because there are too many cars on the roads. They are expensive to produce and maintain.