Information on hybrid electric vehicle (HEV) and fuel cell vehicle (FCV) research and development at the National Renewable Energy Laboratory.

The Department of Energy's fuel economy site gives gas mileage tips, gas price info, and a tool to compare fuel efficiency of hybrids and conventional cars. The "Fuel Economy Guide" provides the government view on reasons to be concerned about fuel economy.

Graphical tutorial explains the workings behind these vehicles. Also includes some current real-world examples and related links.

Articles about environmentally friendly hybrid car transportation. Addresses issues and technical aspects.

Offers background information about various clean transportation technologies including hybrid gas-electric cars, fuel cells, and all-electric vehicles. Also find an analysis of the potential of hybrid cars, driver viewpoints, and a green car buying guide.

A non-profit group promoting "plug-in hybrids" - hybrid gas/electric cars that have larger batteries and can be recharged at an outlet.

News, forums, and marketplace related to electric cars, hybrid-electric and fuel cell vehicles. A lot of the content requires a paid subscription.

Ranks cars and trucks according to environmental friendliness. Using this consumer guide, buyers can compare cars, vans, pickups, and sport utility vehicles by their environmental impacts, including air pollution, global warming, and fuel efficiency.

The interactive hybrid cars resource. Hybrid discussion forums, articles & tips, the Real Hybrid Mileage Database and hybrid car image gallery.

An ideal consumer and technology resource on hybrid-electric vehicles. Find out how hybrids work and compare vehicles side by side, rating fuel economy, emissions, and degree of hybridization.