You are looking for alternative fuels
Alternative fuels, also known as non-conventional or advanced fuels, are any materials or substances that can be used as fuels, other than conventional fuels.
en.wikipedia.org/wiki/Alternative_fuel
The Alternative Fuels and Advanced Vehicles Data Center (AFDC, formerly known as the Alternative Fuels Data Center) provides a wide range of information
www.afdc.energy.gov/afdc
Alternative Fuels. These fuels are defined as alternative fuels by the Energy Policy Act of 1992 and are currently, or have been, commercially available for vehicles.
www.afdc.energy.gov/afdc/fuels/index.html
Alternative Fuels The phrase 'alternative fuels' is usually used to mean fuels for motor vehicles that are not gasoline
www.answers.com/topic/alternative-fuel
Alternative fuels such as ethanol, natural gas, propane, electricity, hydrogen, biodiesel, methanol and P-Series fuels provide alternatives to fossil
environment.about.com/od/fossilfuels/tp/top_alt_fu...
Alternative fuel sources. From hydrogen cars and microbial fuel cells to break-throughs in bioconversion, browse the latest research in alternative fuels.
www.sciencedaily.com/news/matter_energy/alternativ...
Ethanol, methanol, biodiesel? What's all the alternative fuels excitement about? In the simplest terms, an alternative fuel is any fuel other than gasoline or diesel.
www.edmunds.com/advice/alternativefuels/articles/1...
This page is a Student's Guide to Alternative Fuel Vehicles An alternative fuel vehicle is a vehicle that runs on alternative fuels. So, what is an alternative fuel?
www.energyquest.ca.gov/transportation
This web site provides links to information about alternative fuel conversions, which are vehicles that are modified to run on a different fuel
www.epa.gov/oms/consumer/fuels/altfuels/altfuels.h...
Alternative fuels are derived from resources other than petroleum. To promote alternative fuels, the Federal government offers tax incentives to consumers
www.fueleconomy.gov/feg/current.shtml
