Volvo XC60

Hybrids, meanwhile, continue to evolve and expand their market share. This Volvo XC60, seen at the North American International Auto Show in Detroit last month, is a plug-in diesel hybrid designed for optimal efficiency and low CO2 emissions. Drivers can choose between pure electric for about 30 miles, hybrid, or "power" mode. But don't expect to see many around your neighborhood soon, Volvo is aiming the car, which will cost about $75,000, mainly at corporate customers.