What is the difference between the PM2.5 and AQI measurements?

Thomas Talhelm 空气污染, 空气质量测试仪, PM2.5

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你知道这些吗？

Air pollution informationWhat’s the difference between PM2.5 and PM10?
PM10和PM2.5—空气污染物颗粒的区别
今天美国大使馆公布AQI是零！夏天的PM2.5一定低吗？

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