Countdown to 2020

Algae could be fuel game changer

The ultimate green solution to our energy needs may be right beneath our feet, but at what cost to Scotland, asks Peter Jones

If YOU have paving or walls which get damp, you will be familiar with the green slimy stuff which tends to grow on it. Underfoot, it is a damn nuisance as it can turn your nice patio or stone steps into a slippery leg-break trap. But it could, ridiculous as it sounds, be something that could help save the world, even if it might have a distinct downside for the Scottish economy.