These five ideas for alternative fuel range from the outlandish, to some that may even be possible someday. If nothing else, at least they're entertaining. See more »

The search for alternative fuel is on. Could a pocket-sized version of a nuclear power plant make your car run 5,000 miles (8,047 kilometers) between fill-ups? See more »

The biodiesel quiz will test your knowledge about biodiesel components, biofuel history and biodiesel pros and cons. Take the quiz and see how much you know about how biodiesel works. See more »

What do vegetable oil, corn and salt water have in common? They're all potential fuel sources for our cars. See how much you know about the next generation of biofuels in our Biofuel Quiz. See more »

Fuel cells are still pricier than even premium-grade gas -- do you know why? Test your fuel cell know-how in this quiz and learn some cool fuel cell facts along the way. See more »

Hydrogen-powered vehicles may be the wave of the future, but do you know why? Test your knowledge of this extremely light, clean-burning fuel source with the hydrogen-powered vehicle quiz. See more »

Fuel cells and hydrogen power offer many benefits, but there are dangers as well. Put on your protective gear and find out how much you know about hydrogen fuel's dangers (or lack thereof) in this quiz. See more »

There may be "water, water everywhere and not a drop to drink," but what if you could substitute seawater for gasoline? It's a little like alchemy, but could it work? See more »

Can we use grass to power our cars? Proponents of cellulosic ethanol made from switchgrass think we can. Others fear we'll stop growing food to grow fuel. See more »

Soybean byproducts are nutritious and healthy. They can also power a car. Find out how soybean and other plant oils as well as animal fats are used to create the environmentally friendly fuel biodiesel. See more »