Ozone level increasing, report finds

Other air pollutants are declining in Beijing-Tianjin-Hebei region

The concentration of hazardous ozone in the Beijing-Tianjin-Hebei region and surrounding areas has been increasing, even though other major air pollutants have been declining, according to a report published on Tuesday.

Ozone is the only one of the six major air pollutants - including nitrogen dioxide, sulfur dioxide and PM 2.5 - that is rising, according to the air quality evaluation report published by Peking University's Guanghua School of Management and the Center for Statistical Science.