Tooling along in your solarmobile...

Among the prototypes for alt-fuel cars presented at the Challenge Bibendum in Shanghai this month: your very own solar-powered car.

Economic growth, social development -- just means more trucks, buses and cars on the road.

The internal combustion engine and petroleum started the whole hullabaloo, but with limited resources of fossil fuels, mad scientists are pondering ways to keep folks on the road, without them having to fork over two bucks a gallon.

Solar-powered cars aren't the only trippy prototypes at the exhibition -- there are also the usual suspects, like diesel/battery hybrids, electric cars, and, of course, cars powered by hydrogren fuel, which will give everyone yet another opportunity to argue about hydrogen vs. petrol. Feel free. In the meantime, dig that trippy little car. Beep, beep.

Find out more here: Challenge Bibendum