Alternative fuels have been making noise ever since the summer, when gas prices rose to more than $4 per gallon. One of the alternatives that has seen a lot of support is natural gas — but can you actually buy a car that runs on natural gas? If so, how expensive would it be? And where could you refill it? takes you through each of these questions and weighs the pros and cons of a natural-gas vehicle.

Do Any New Cars Use Compressed Natural Gas? (