Adult obesity rates reached 9.6 percent in 2012, more than doubling over a decade, the National Health and Family Planning Commission said in a report on national nutrition and chronic diseases. “The problem of overweight and obesity is rising sharply as the dietary make-up has changed,” Wang Guoqiang, a vice director of commission, told a press conference. “Smoking, excessive drinking of alcohol, insufficient physical exercises and unhealthy diet such as high salt and fat consumption are the main behaviour risk factors that trigger and worsen chronic diseases,” Wang said at the briefing Tuesday.