Creativity the key to a cleaner energy future

WILL the cars of the future have four wheels? Or three? Or none at all? Will they even have windows? And what will we use to fuel them?

An event taking place this weekend will provide a little preview of what that future might have in store - the Shell Eco-marathon. At Singapore's Changi Exhibition Centre, students from around the world will compete to drive the furthest distance on the least amount of energy.

Some will drive ultra-efficient petrol and diesel cars. Others will drive cars powered by hydrogen, liquefied natural gas, ethanol, and lithium batteries. It's a lot of fun... but it's more than just fun.