Hemp
Hemp is an interesting plant that can be used for food, clothing, paper, and fuel. It is grown everywhere in the world--except the U.S. This site explains hemp's potential as a fuel.
One Molecule Could Cure our Addiction to Oil
A Wired article from 2007 focusing on transforming cellulose to oil (cellulosic ethanol); focusing on plants other than corn--primarily switchgrass
U.S. Department of Energy: Energy Efficiency and Renewable Energy
This site links to discussions of many alternative energies, for example, hydrogen which is neither mined nor drilled but is created; it is usually used as a natural gas, and storage is a problem for the liquid form. Other sources covered include biodiesel, electricity, ethanol, natural gas and propane.
Car Engines and Fuels
includes steam-powered cars, microwave powered cars, and so on.
Steam Automobile Club of America
sponsors discussion groups on theory of steam powered cars for the future, and so on.
Stirling Engine Home Page
The Stirling is one of a series of devices that is a heat engine that operates on any fuel. This futuristic technology (invented in 1816) is in use but is not widespread.
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