(1) specialized in (2) of Article 2 of the notice board of national environmental, Vol. 10 (now BC) issued by the specialized in the enhancement and conservation of national environmental quality. BCThe 1992 on ambient air quality standards generally
(2) specialized in (1) of Article 6 of the declared National Environment Commission Vol. 10 (1999)Now) issued by the specialized in the promotion and conservation of national environmental quality in 1992 matters, the ambient air quality standards in general. Amended by the national environmental committee announcement No. 28 (1999)Shortly), the ambient air quality standards in general.
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