What concepts and technologies can make our cars and other automobiles far more energy efficient and sustainable?

The auto industry is one of the largest contributors to CO2 emissions globally (next only to power plants). This is owing both from the CO2 emissions from their products (automobiles) and the energy used by the auto industry for making the products - the former (end products) is the dominant contributor to CO2 emissions between the two. What can be done to make our existing fleet of automobiles as well as the new ones coming on to the roads, energy and environmentally more sustainable?

How will it have a positive impact?

Better Health of Planet

Energy Security

Resource Security

Economic Benefits

Who will it have a positive impact on?

Urban Community

Industries

Developed Countries