April 22, 201214 yr Hello! During the smog I stay one month in Chiang Mai only with the mask, when I sit in the song tail the eye beginn burning after minutes !! In Internet I read the allowed particle conzentration in Chiang Mai! 15 times higher then the eu! If you ask the locals got many time the answer that's normal with the smog , only the farrangs have problems with it? Is there some company in Thailand that sale catalisators for the car ?
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