A car (or automobile) is a wheeled motor vehicle used for transportation. Most definitions of car say they run primarily on roads, seat one to eight people, have four tires, and mainly transport people rather than goods. Cars came into global use during the 20th century, and developed economies depend on them. The year 1886 is regarded as the birth year of the modern car when German inventor Karl Benz patented his Benz Patent-Motorwagen. Cars became widely available in the early 20th century. One of the first cars accessible to the masses was the 1908 Model T, an American car manufactured by the Ford Motor Company. Cars were rapidly adopted in the US, where they replaced animal-drawn carriages and carts, but took much longer to be accepted in Western Europe and other parts of the world.
Energy[change | change source] To make a car move, it must have energy to turn the wheels. This energy might be chemical energy in gasoline or electrical energy in a battery. How quickly the engine or motor can send the energy to the wheels, and how much energy is sent, is called the power of the motor. The power of a car is usually measured in kilowatts or horsepower. Gasoline[change | change source] As of 2019, most cars burn a fuel to make an internal combustion engine (sometimes called a "motor") run. The power from the engine then goes to the wheels through a transmission, which has a set of gears that can make the car go faster or slower. The most common fuel is petrol, which is called "gasoline" or "gas" in American English. Gasoline is called a fossil fuel because it comes from tiny fossils that were made millions of years ago. Over millions of years, they turned into oil, which was then drilled up from deep inside the Earth, and then turned into fuel by chemical changes. Old gasoline-powered cars are noisy and their exhaust makes city air dirty, which can make people ill. But cars made after the mid-2010s are cleaner. Burning gasoline, like any kind of fossil fuel, makes carbon dioxide, which makes global warming. Since 2017, less gasoline powered cars are being made, and some places will not allow gasoline-powered cars in future, like Amsterdam in 2030