The air quality in cities has basically remained stable. TSP pollution prevails widely. Cities that meet the urban air quality standards of level II, III and above III make up one-third each respectively.

• 城市空气质量基本稳定，颗粒物污染范围较广，城市空气质量满足国家二级标准、三级标准和超过三级标准的城市比例各占1/3；