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Standards, methodologies and guidelines
Air Quality Guidelines, WHO, 1999 (Table)


http://www.cleanairstandards.org
CleanAirStandards.org


WHO Air Quality Guidelines, 2000

Air quality guidelines relating pollutant concentrations to public health effects.


WHO air quality guidelines global update 2005

Report on a working group meeting, Bonn, Germany (18-20 October 2005)

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From September 2005 to June 2006

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