Whereas it is desirable to improve the air quality standards revised in the atmosphere generally defined, based on the progress in the scientific, technological, and economic and social changes of the country live, on-demand power in section 34 of the Act to promote and preserve the national environmental quality 2535 (1992) command with the Prime Minister's Office at 71/2550 (2007) March 12, 2007, and the resolutions of the National Environment Committee in meeting 2/2550 (2007) 2550 (2007) revised January 18, when it air quality standards in General, and the following:
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