SciDev.Net: A pilot project that has turned waste straw into rich cattle food and biogas could be expanded to help improve food security and rural energy supply across China, says its leader. Jiang Gaoming, an ecologist at the Chinese Academy of Sciences, initiated the programme in Pingyi County, in eastern China in an effort to find a better use for the 700 million tonnes of straw produced annually in China, of which 37 per cent is burned. Less than a quarter is used as food. By adding …