TechnologyWaste paper turned into a super-spongy battery Treat paper in the right way and it can become a form of porous carbon capable of sucking up charge – making it the perfect battery for storing wind energy ¿ìè¶ÌÊÓÆµ
EarthEnergy trilemma: Can power be cheap, clean and secure? When it comes to electricity supply, we're caught in a vicious triangle. A bold scheme that pays big business to switch off could be part of the solution Features