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人参与 | 时间：2025-02-22 18:29:25
- 远日从北京市面景呵护局患上悉，北京往年前四个月，至月北京市空气中细颗粒物(PM2.5)累计浓度为59微克/坐圆米，累计同比降降22.4%；空宇量量抵达劣秀的浓度天数共有77天，同比删减4天；空气重传染日7天，降降同比削减8天。超两成北京
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