Fuel-efficient vehicles are extremely important. Because we need to cut our fuel consumption and find other ways of powering cars, fuel-efficient vehicles are now very popular. Check out these great fuel-efficient vehicle articles from HowStuffWorks.
Fossil fuels (like gasoline and diesel) are running out and getting a bad rap for nasty tailpipe emissions -- and rightly so. Learn more about how green are automotive lithium-ion batteries. See more »