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  • 首頁 環境時評人與自然最新動態焦點追蹤法律法規環境評價環保產業國內新聞國際新聞環境知識

    污染治理

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    學者稱中國大氣污染防治成效顯著 但減排任務依

    來源:網絡整理 人氣:次瀏覽 發布時間:2019-06-13

      中新社北京6月12日電(記者阮煜琳)中國工程院院士、清華大學教授賀克斌12日在北京指出,中國大氣污染治理已經取得顯著成效,但污染物排放總量依然居高,減排任務依然艱巨。

      賀克斌在2019環保產業創新發展大會上說,過去六年,中國大氣污染防治工作取得顯著成效。主要污染物排放量顯著降低。全國環境空氣質量總體改善明顯。2018年,全國338個地級及以上城市可吸入顆粒物(PM10)平均濃度比2013年下降了26%,細顆粒物(PM2.5)平均濃度較2015年下降了22%。

      2013年以來,中國氮氧化物(NOx)和二氧化硫(SO2)排放總量分別下降28%和26%。美國國家航空航天局(NASA)衛星遙感數據顯示,2013年至2018年,中國二氧化氮(NO2)和SO2垂直柱濃度總體呈顯著下降趨勢。

      賀克斌說,二氧化硫是中國污染治理取得明顯成效的典型事例,另一個是酸雨的治理,近6年來,全國酸雨面積呈逐年減小趨勢,2018年,全國酸雨區面積占國土面積已降至5.5%,降幅近50%。

      分析各類措施對全國PM2.5濃度改善的貢獻,賀克斌說,2013年至2017年間,全國74個重點城市PM2.5平均濃度每立方米下降了25%,重大減排工程、能源結構調整和產業結構調整各自貢獻了每立方米10微克、6.8微克和4.2微克,分別占40%、27%和17%。其中,燃煤鍋爐整治、工業提標改造、電廠超低排放改造和揚塵綜合治理是對PM2.5濃度改善效果較為顯著的措施。

      賀克斌同時指出,中國大氣污染治理已經取得很大進步,但大氣污染物排放量仍居世界前列,以每平方公里的排放強度來說,我們的減排任務依然艱巨,特別是京津冀地區。未來PM2.5平均濃度、臭氧、揮發性有機化合物(VOC)總量減排的協同治理是關鍵,同時還有霾和碳的協同治理,涉及到產業、能源、綠色技術等,這些都是需要迫切解決的問題。(完)

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