In many ways, the automobile has been one of the most important inventions of the modern age. |
People have been able to travel much more freely, |
and across much greater distances, than was possible in the past. |
The automobile, which most people refer to as the “car” |
has also had some harmful consequences, such as pollution and accidents. |
However, it is clear that life has changed profoundly as a result of the car. |
Modern cars are very complicated, but the basic idea of how a car works can be described briefly. |
When the keys are turned in the ignition of the car, |
this creates a spark that ignites some gasoline vapor inside a cylinder. |
Then, the rapid expansion of this vapor pushes against a part called a piston. |
The movement of the piston then causes a turning motion in a shaft that is connected to the wheels. |
The wheels turn, and the car moves. |
The invention of the car, and the engines used by cars, |
happened gradually in the late nineteenth century, mainly in France and Germany. |
In the early twentieth century, an American engineer named Henry Ford developed a new way of making cars. |
Instead of having one worker produce an entire car, |
he had each worker perform one part of the production of many different cars. |
This system was very efficient and allowed the mass production of cars. |
The first car to be produced in large numbers was called the “Model T”. |
The Model T Ford and other cars that were soon produced in large numbers |
were cheap enough that many people could afford to buy them. |
Many new roads were built and paved throughout North America to allow cars to be driven from town to town. |
People were able to travel much more easily and to visit places that had previously been difficult to reach. |
Some problems also came with the widespread use of cars. |
One of these problems was air pollution, because car engines burn gasoline, |
which produces poisonous exhaust fumes. |
Gradually, new laws and new technology have led to reductions in the air pollution that is caused by cars. |
Moreover, cars today are much more “fuel efficient” than they were in the past, |
requiring less gasoline to travel a given distance. |
However, this pollution is still a problem because of the many millions of cars that are used each day. |
Another problem has been car accidents, which have caused many thousands of deaths each year. |
During the 1960s, some journalists brought attention to the unsafe features of many cars. |
As a result, the safety of cars has been greatly improved. |
In addition, the use of seat belts is now required by law. |
However, car accidents continue to be a serious problem. |
The future is likely to bring many interesting new changes to the car. |
Improvements in the safety of cars, in fuel efficiency, |
and in the cleanliness of car emissions are continuing to be made. |
Also, the increasing use of the car in economically developing countries will probably have important effects upon people’s lives around the world. |
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