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Old Dec 13, 18, 8:51 pm
Join Date: Dec 2007
Location: PEK and BOS
Programs: BA - Blue
Posts: 3,589
Originally Posted by Dr. HFH View Post
A mask will help greatly with particulate matter (the result of burning off crops, etc., visible smoke, generally) but not really with gasses like vehicle exhaust fumes.
Much vehicle exhaust (e.g. SO2) is actually particulate in nature for reasons, as a non-chemist, I'm not 100% au fait on...(except e.g. CO, O3). So masks _will_ actually help to some extent...

It should be noted that the vast majority of the world's population live in polluted cities...and I don't think BKK is especially bad on the scale of things...If OP is _that_ concerned about pollution, will severely limit travels outside NA and Europe.

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