Beijing is one of three cities being asked to reduce levels of the tiny airborne pollutants that are a major cause of smog. Photo: EPA
Quarter of Beijing's air pollution originates from elsewhere
In breaking down the source of the capital's air pollution, the local environmental bureau shows the answer will require regional effort
Beijing is one of three cities being asked to reduce levels of the tiny airborne pollutants that are a major cause of smog. Photo: EPA
