Better living through green chemistry: Food and drink Here's a fact you might find distasteful if you drink decaf: coffee beans are often washed free of caffeine by soaking them in solvents like methylene chloride, a suspected carcinogen Features
Technology'Electron turbine' could print designer molecules Slotting nanotubes together and running current along them could create the simplest nanomotor yet – it could find use as a tiny printer or digital memory News