EnvironmentHow the fossil fuel era ends – and four possibilities for what follows Ever cheaper wind and solar power means the decline of coal, oil and gas is unstoppable. The trillion-dollar question is how, and how quickly, their demise comes about Features
EarthUse waste rather than crops for biofuels, says UK report Liquid biofuels can help reduce carbon emissions, but the focus should be on making them from wastes such as cooking oil, says major review News