北京当前已达重度污染，明晚空气质量可改善至优良水平
近日，北京市及周边地区遭遇区域性污染过程，空气质量指数达到重度污染标准，首要污染物为PM2.5。污染原因包括不利气象条件、区域性污染传输和本地污染积累。同时，北方最大规模沙尘天气正向中东部地区推进，预计11日晚间将影响北京市，导致PM10浓度显著上升。12日傍晚外来沙尘影响将减弱，夜间空气质量有望改善至优良水平。
媒体报道
北京当前已达重度污染，明晚空气质量可改善至优良水平 界面
北京已达重度污染 界面
北京已达重度污染 首要污染物为PM2.5 格隆汇
事件追踪
2024-03-15 北京将启动空气重污染黄色预警
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