Volkswagen's XL1 said to be world's most economical car

(PhysOrg.com) -- Volkswagen has unveiled its new, prototype super-efficient hybrid vehicle, the XL1, at this week's Qatar motor show. The car has been under development for a decade and Volkswagen claims it is the most economical ...

Bringing the Biodiesel

For some people, "biodiesel" might seem like a novelty product for which only hybrid car-driving tree huggers wouldn't mind paying a premium.

London bids to be world's greenest by 2012: mayor

Mayor Boris Johnson outlined plans to make London "the cleanest, greenest city on earth" by the 2012 Olympics and called for commitments from other world cities at a climate change conference.

Green car makers urged to go a step further

Four international bodies on Wednesday called on governments and car makers to halve global vehicle emissions by 2050 as the auto industry insisted it was serious about producing greener vehicles.

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