The 100 mpg car is being promoted by Google.org in an effort to reduce oil use and harmful emissions. Learn all about Google's 100 mpg car program. See more »

One of the easiest ways to increase a car's efficiency is to reduce its weight. Carbon fiber -- a material as light as it is strong -- could do just that. See more »

With skyrocketing gasoline prices, drivers everywhere are seeking ways to improve their fuel economy. Find out how green your knowledge is with the green driving quiz. See more »

Most people never think about driving through a wall; however, drivers do it each and every day -- except the "wall" is actually a wall of air and your car's aerodynamics help you break through it. See more »

As gas prices rise and dire warnings about global warming take over the news, consumers are considering alternatives to gasoline. How much could fuels from corn and vegetable oil run you? And who's setting the price? See more »

Gone are the days when you battled your brother over your mom's car keys. Now, car sharing is civilized, organized and affordable. See more »

Why do the EPA fuel economy numbers almost always seem to be off base? It has a lot to do with the way the EPA evaluates new cars and trucks for their energy consumption. See more »

As gas prices spike daily, we're all looking to save money at the pumps. But if your car uses daytime running lights, be prepared to dig deep into your wallet. See more »

Word on the street is gas prices are soaring. But as people begin to scour auto dealers for fuel efficient cars, they might notice efficiency ratings have changed a bit. See more »

Since its formation in 1967, the California Air Resources Board (CARB) has created a number of mandates that have shaped the car industry in surprising ways. Do you live in a California emissions state? See more »