Where  do cars get their energy from? For most cars, the answer is petrol. But some cars use electricity. These cars have special motors which give them power from large batteries. In addition, there are some cara that have both an electric motor and a petrol motor. Such cars are called hybrid cars.

Most people believe that electric cars are new invention, but they have been a around for a long time. In the late 19th and early 20th centuries electric cars were popular because the technology for petrol engines was not very advanced. But once the petrol engine became easier to make and more powerful, they became the most popular. Later the interest in Electric cars was high in the 1970s and 1980s because oil became very expensive. Recently, electric cars have again become popular because people want that cause less pollution to the environment.

Electric cars are better than petrol cars in several ways. The biggest benefit  is they reduce environment pollution. But it is important to understand that electric cars can also cause pollution to some extent. Remember that the electricity to power electric cars has to come from a power station. Unless these power stations run on solar or wind energy, they burn fossil fuels to make electricity which pollutes the environment. However, the second benefit of electric cars is a reduction in the dependence on foreign oil. There are several countries, including the United States, that don't want to rely on oil coming from other countries to power their transportation systems. They want the powr to come from within their country, and since electric cars can run on electricity from coal or nuclear power stations, there is less need to import oil.

Although there are some benefits of electric cars, there are some problems with them as well. One disadvantage is that electric cars are more expensive than normal cars. This is mostly due to the high cost of the batteries these cars need. Electric cars run on batteries just like a mobile phone does. But unlike a mobile phone, you cannot charge your electric car's battery by plugging it on to a wall. They need to be charged in special places. At present, they are only a few places where people can charge the batteries of their electric cars. Another problem is that electric cars cannot travel as far as petrol cars. Some people are afraid that the battery will run out of electricity before they reach their destination.

Despite these problems, many people, including experts in automobile industry, believe that the percentage of electric cara will increase in the future.