上半年中国地级及以上城市平均空气质量优良天数比例为83.8%|97视频在线观看播放

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  中新社北京7月28日电 (记者 阮煜琳)中国生态环境部新闻发言人裴晓菲28日在北京举行的新闻发布会上表示,今年上半年,中国环境空气质量总体持续改善,全国339个地级及以上城市平均空气质量优良天数比例为83.8%。

  生态环境部当日公布全国环境空气质量状况显示,上半年,全国339个地级及以上城市细颗粒物(PM2.5)平均浓度为32.1微克/立方米,同比下降2.4%;可吸入颗粒物(PM10)平均浓度为55微克/立方米,同比持平。

  同期,京津冀及周边地区“2+36”城市PM2.5平均浓度为40.8微克/立方米,同比下降15.4%。其中,北京市PM2.5浓度为28.5微克/立方米,同比下降17.4%。

  上半年,全国339个地级及以上城市平均空气质量优良天数比例为83.8%,同比上升1.0个百分点;平均重度及以上污染天数比例为1.5%,同比持平。由沙尘天气导致的平均超标天数比例为4.2%,其中重度及以上污染天数比例为1.0%。

  上半年,168个重点城市中,空气质量较好的前20个城市依次是拉萨、海口、张家口、惠州、黄山、深圳、贵阳、珠海、厦门、福州、舟山、丽水、中山、昆明、东莞、雅安、台州、宜春、承德和肇庆市。(完)

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发布于:北京市