Gas Mileage

The Obama administration has announced that it will issue new emissions and mileage requirements for cars and light trucks tomorrow to create a single national standard.

In an effort to improve gas mileage, 400 drivers in Denver participated in an experiment that tracked and reported the bad driving habits -- idling, rapid accelerating and braking -- that waste fuel. Faced with the data, driving habits have changed.

The 'Nano', a tiny car that gets 47 miles to the gallon and has low emissions, is hitting the Indian market. Environmentalists worry that the car's advantages will be outweighed by the increase in car ownership it may bring to the country.