10月中国地级及以上城市PM2.5平均浓度同比下降17.5%|无码国产69精品久久久久同性

  中新社北京11月26日电 (记者 阮煜琳)中国生态环境部26日向媒体公布全国环境空气质量状况显示,10月,全国339个地级及以上城市平均空气质量优良天数比例同比上升3.9个百分点,细颗粒物(PM2.5)平均浓度同比下降17.5%,空气质量呈向好态势。

  10月,全国339个地级及以上城市PM2.5平均浓度为23.5微克/立方米,同比下降17.5%;可吸入颗粒物(PM10)平均浓度为39微克/立方米,同比下降18.8%。10月,全国339个地级及以上城市平均空气质量优良天数比例为96.2%,同比上升3.9个百分点;平均重度及以上污染天数比例为0.3%。

  10月,京津冀及周边地区“2+36”城市PM2.5平均浓度为34.7微克/立方米,同比下降37.1%,其中北京市PM2.5浓度为31.7微克/立方米,同比下降24.9%。10月,汾渭平原13个城市PM2.5平均浓度为28.9微克/立方米,同比下降33.7%。

  10月,全国168个重点城市中,空气质量较好的城市为贵阳、昆明、遂宁、南充、舟山、广安、拉萨、海口、雅安、福州;空气质量较差的城市为保定、石家庄、株洲、天津、乌鲁木齐、葫芦岛、沈阳、焦作、廊坊、邯郸。(完)

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