A driver looks out from his methane-powered taxis as he queues at a gas station in Jincheng City, in north China's Shanxi province, March 1, 2007. China aims to reduce emissions of pollutants by 10 percent -- and the amount of energy required to generate each unit of gross domestic product by 20 percent -- between 2006 and 2010. Picture taken March 1, 2007. REUTERS/Claro Cortes IV (CHINA)

A driver looks out from his methane-powered taxis as he queues at a gas station in Jincheng City, in north China’s Shanxi province, March 1, 2007. China aims to reduce emissions of pollutants by 10 percent — and the amount of energy required to generate each unit of gross domestic product by 20 percent — between 2006 and 2010. Picture taken March 1, 2007. REUTERS/Claro Cortes IV (CHINA)

Hold on tight. Photo: REUTERS/Claro Cortes IV

November 1, 2016 2:20 PM (UTC+8)