So you're excited about the 2010 Prius, with its modest mileage gains. Or maybe you really want a Chevy Volt, with a 40 mile all-electric range. 2010, as we've noted, is going to be a good year for green cars. But, well, this is ridiculous.

VW has been talking for a long time about their 1L concept, so called because it uses a measly 1 liter of gasoline to go 100 km. For us Americans, that translates to about 230 miles per gallon. Of course, the amazing mileage comes at a price. The car is tiny, more of a tobaggon than a car. The single passenger actually sits behind the driver, like in a small airplane.