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Car Runs Mostly on Air

Developer Zero Pollution Motors is working on a compressed air vehicle (CAV) that could run "all day on nothing but air and a splash of salad oil, alcohol or possibly a pint of gasoline." Cost: $20,000. Timing: 2011.

As far back as 2005, however, experimental vehicles were getting up to 250 mpg. Getting these sorts of vehicles into production requires serious industry and political willpower, not just hot air. Meantime, there are a slew of hybrid SUVs and trucks that get around 21 mpg ... progress?

[How Hybrids Work]

This article is from the LiveScience Water Cooler: What people are talking about in the world of science and beyond.

Robert Roy Britt
Rob was a writer and editor at starting in 1999. He served as managing editor of Live Science at its launch in 2004. He is now Chief Content Officer overseeing media properties for the sites’ parent company, Purch. Prior to joining the company, Rob was an editor at The Star-Ledger in New Jersey, and in 1998 he was founder and editor of the science news website ExploreZone. He has a journalism degree from Humboldt State University in California.