Combustion engine is actually 19th century technology. It's weird why an engine which is only 30% energy efficient is still being used. It's ancient. Electric cars are the future. Say bye to big oil in next decades. Lithium is the key.
Yes you are may be right. but what is price for electric car- purchasing price?
Producing price per car ? Maintenance, battery ?
Combustion engine may be an "ancient" technology, but it is so pervasive because for the amount of energy you get for the cost, combustion engines are cheap and easy. I also believe electric cars are the future. I currently own a hybrid car. Comparatively, a hybrid car costs a few thousand dollars more than the exact same non-hybrid version, about $2-3k. I've more than made up that cost in the years of driving it, so it's been a sound investment.
As for electric-only, there are plenty of viable models that are not overly expensive. The Nissan Leaf starts at $29k and the Chevy Volt starts at $33k. Tesla is working on a version now as well that will start in the mid-$30k range. The biggest limitation for electric-only vehicles for me is the range. I think the Leaf is around 100 miles, and the Volt offers 50 electric-only miles, though it does run on gas as well.
Well, the killer is not only the range. It's also the recharge time. The average gas vehicle goes about 300 miles before needing to stop for 2 minutes to fill up. Even if you got a car that can do that 300 mile range, it will still take you hours (if quick charging) or most of a day (if not interested in killing battery) to recharge. Hybrids make a lot more sense, especially for heavier use in urban centers. Idling in a regular car is basically burning gas to power your radio.