北京市发布了《北京市空气重污染应急预案（2023 年修订）》(以下简称《应急预案》)，对预警分级标准进行了优化调整，整体降低了预警启动门槛。这一举措旨在减少空气污染对市民健康的影响，提高空气质量管理水平。
据了解，新修订的《应急预案》对预警分级标准进行了调整，将预警级别由原来的三级改为两级，并调整了预警启动门槛。其中，一级预警启动门槛为：空气中可吸入颗粒物浓度达到 300 微克/立方米及以上，二级预警启动门槛为：空气中可吸入颗粒物浓度达到 150 微克/立方米及以上。
此外，《应急预案》还规定，当可吸入颗粒物浓度达到预警级别时，将采取一系列应急措施，包括减少污染源排放、增加空气净化设备运行时间等。同时，市民也将接到短信、手机 APP 等通知，提醒他们注意空气污染防护。
对于此次修订，市民纷纷表示支持。一位市民表示：“北京作为国际化大都市，空气质量问题一直备受关注。现在空气污染问题得到更好的解决，我们感觉非常放心。”
英文翻译：
Beijing has released the revised Air Pollution Emergency Plan, reducing the threshold for triggering alerts. This move aims to reduce the impact of air pollution on the health of citizens and improve the quality of air management.
The revised plan adjusts the warning level and threshold for triggering alerts. The level has been reduced from three to two, and the threshold for triggering alerts has been adjusted accordingly.
The plan also specifies that when the air pollution concentration reaches the warning level, emergency measures will be implemented, including reducing pollution emissions, increasing the operation time of air purifiers, etc. At the same time, citizens will receive notifications through 短信，mobile APP 等 to remind them to protect themselves from air pollution.
The public expressed their support for this revision. A citizen said, “Beijing, as an international metropolis, has always been concerned about air pollution. Now, the issue of air pollution has been better addressed, and we feel more secure.”
【来源】http://www.chinanews.com/sh/2023/10-25/10100495.shtml
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