Guardian: People should paint their roofs white and drive "cool" cars on pale-coloured roads to avoid devastating climate change, US energy secretary and Nobel prize-winning physicist Steven Chu has advised Prince Charles and a group of 19 other laureates meeting in London today. The measures, which would reflect sunlight and enable buildings and automobiles to stay cooler and use less energy in summer, are some of dozens that Chu and the US energy department are considering for the …