方法对2001年至2004年郑州市空气质量自动监测数据进行统计分析、利用环境质量指数法进行评价。
Methods By the means of environment quality index, the air monitoring data of Zhengzhou from 2001 to 2004 is analyzed and evaluated.
三亚以其空气质量致胜，大连的城市安全与自然环境指数较高，而威海以其自然与文化环境跻身前五。
Sanya wins for its air quality and Dalian performs well in city safety and natural environment. Weihai, meanwhile, cracks the top five due to its natural and cultural environment.
对铁岭市2006年和2007年的环境空气质量进行对比分析，其中包括大气质量综合污染指数、可吸入颗粒物、二氧化硫和二氧化氮、降尘等指标的统计分析。
Comparative analysis of air quality indexes between the year of 2006 and 2007 of Tieling is conducted including air quality comprehensive pollution index and PM10 and SO2 and NO2 and fall dust.
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