Reuters: China cut its water pollution and emissions of acid rain-causing sulphur dioxide last year, as it stepped up efforts to make its economic growth cleaner, state media said on Wednesday. Chemical Oxygen Demand (COD), a measure of water pollution, dropped by 4.42 percent in 2008 from a year earlier, while sulphur dioxide emissions were down 5.95 percent, the official Xinhua news agency said. China has promised to cut the two key pollution measures by 10 percent between 2006 and …