What the shale oil counter-revolution means for clean energyp

More big changes are afoot in the shifting sands of the global energy industry. Crude oil derived from shale formations suddenly has the potential to create an abundance of hydrocarbon energy for transportation, where previously it was in short and ever-dwindling supply. For now this is a phenomenon unique to the US, but has the potential to spread around the world, writes Ted Franks of environmental fund manager WHEB Asset Management.