A glut of new coal-fired power stations endangers China’s green ambitions

CHINA IS HOME to half the world’s coal-fired power stations, the most polluting type of generator. Their share of the country’s electricity market is shrinking as nuclear plants and renewables slowly elbow them off the grid. But Chinese investors and local governments are still keen on them. Last year coal-fired generating capacity expanded in China by 37GW (factoring in plant closures)—more than the amount by which it grew globally. China has been relaxing curbs on building such plants. That suggests more to come.

Work on many of the new coal-fired stations began after the central government gave local officials greater freedom to approve construction at the end of 2014. The aim was to cut red tape, not to ramp up the burning of coal. But it resulted in a blizzard of new permits. Within about a year provinces had approved enough new plants to expand China’s coal-powered generating capacity by a quarter.