At present, 68.4 percent of urban residents in China use gas; the centralized disposal rate of urban sewage is 20 percent; the innocuity rate of urban garbage and fecal disposal is 45.4 percent; and the afforestation rate is 23.8 percent.

• 目前，全国城市居民用气普及率68.；4%25，城市污水集中处理率20%25，城市垃圾粪便无害化率45