Green groups are starting to rumble the fact that wind power ain’t so green, after all. Giant industrial wind turbines comprise hundreds of tonnes of steel, aluminium, plastics, copper and rare earths used in the generator’s magnets. There is also at least a tonne of gear oil and hydraulic fluid on board. And then there’s the 50-80 m long blades each weighing between 12 and 18 tonnes, each a veritable cocktail of toxic plastics, fibreglass and composite materials – all inevitably headed for landfill.