The survey report, written by environmental and economic experts from the World Bank, pointed out that 10 of the world's 20 most polluted cities are in China, and that China's fight against environmental pollution is imminent and a long way off. The survey report said that China's urban areas in the air suspended particles and sulfur content is currently the world's highest, including Taiyuan, Shanxi Province, the content of suspended particles in the air is eight times the World Health Organization's standards, Jinan is close to seven times, Beijing and Shenyang is close to six times. As for the level of sulphur dioxide in the air, Chongqing has the highest, close to seven times the standard set by the World Health Organization. Pollution has become a serious threat to the physical and mental health and intellectual development of Chinese people.