热点 来源:界面新闻 时间:2023-04-12 13:11:52
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据北京市生态环境监测中心官网消息,截至4月12日12时,北京市空气质量指数为212,污染级别为5级,已达重度污染标准。目前空气中的首要污染物为PM10。
(文章来源:界面新闻)
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