AdminAnonymous (Admin, World Air Quality Index Project)

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    1 comment  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAnonymous (Admin, World Air Quality Index Project) commented  · 

    Very good question. The answer is explained in this post: http://aqicn.org/faq/2013-02-02/why-is-pm25-often-higher-than-pm10/

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