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Read hybrid car reviews and compare hybrid models. Buying guides and interactive tools. Read about plug-in hybrids, electric cars, biofuel-powered cars, fuel-efficient small cars, and other auto alternatives for the 21st century.

The HowStuffWorks Auto Section contains articles about everything from engine workings to classic cars. Learn about cars on HowStuffWorks Auto.

U.S. News' Best Car rankings offers comprehensive reviews, ratings and pictures for all new and used cars and trucks

Find breaking news, multimedia, reviews & opinion on Washington, business, sports, movies, travel, books, jobs, education, real estate, cars & more.

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The Union of Concerned Scientists is the leading science-based nonprofit working for a healthy environment and a safer world through a combination of independent scientific research and citizen action.

ipl2: Information You Can Trust features a searchable, subject-categorized directory of authoritative websites; links to online texts, newspapers, and magazines; and the Ask an ipl2 Librarian online reference service.

Future Cars are the next alternative to the internal combustion engine and oil. Discover the technology, reviews, videos, interviews and research on these cars and fuels of the future.

News, research and opinion on alternative fuels and hybrid cars, as well as the issues impacting them. New and emerging technologies shaping the future of alternative fuels, laws and regulations impacting green fuel progress, hybrid car reviews and c...

Yahoo! Answers is a new way to find and share information. You can ask questions on any topic, get answers from real people, and share your insights and experience.

This is the home page for the California Energy Commission

wiseGEEK: clear answers for common questions

Eartheasy provides solutions for sustainable living in the form of eco-friendly products, comprehensive guides, and informative articles.