Earth's Frontiers

SHOW #9

Green Vehicles and Alternative Fuels

As the world's oil starts to run dry, demand is rising for green vehicles, and hybrid and concept cars are making their way from designers' imaginations to mass production. But will the cars of the future be powered by substances from the earth, like lithium, or by thin air itself?

We also visit the home of U.S. entertainer and self-confessed "petrol head" Jay Leno, as he showcases his own eco-garage.