Today we go to a radical change in the auto industry. Electric cars become more common, as well as hybrid cars. Energy-efficient transportation technologies such as electric batteries are rapidly improving. Diesel cars are back and the technological advances make them far better than ever. The cutting edge technology and efficiency improvements make even the internal-combustion gasoline engine better than before. The increasing fuel economy standards imposed by the government, the environmental concerns and the rising gas prices make the demand for green cars strong.