Which season air pollution turing bad?

During this autumn, many people know, especially Malaysian,
Indonesian and Chinese people.
Autumn means sand storm, haze and other pollution.
This time poor visibility because fine particulate matters pollution.
Indoor air quality can be filtering by air cleaner, what should we do when outside?
Use laser particle counter to detect, if high value use pear rock
sugar together to boil water to drink will be help.


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