Experts on technology issues are waiting in anticipation for electric cars to become more popular. Electric cars are a new generation of cars, which derive electric power from their batteries, instead of using an internal combustion engine like traditional cars. While it may seem that electric cars are something new, people who lived 100 years ago already had electric cars, and Thomas Edison was one of them. While electric cars are environmental friendly, they also have some problems and this includes the fact that they are dangerous to pedestrians. That is because electric cars are silent, and while this is often regarded as an advantage, they have a potential of becoming silent killers. It does not mean we should not use electric cars at all, but perhaps they should emit some kind of sound that would warn people that cars are driving by. It could be something similar to the sound of engine, but it should be different, as regular cars are definitely too noisy and often have an annoying sound according to many people. Anyway, most experts predict that electric cars will gain popularity in the future because they are eco-friendly. Would you replace your car with an electric one?