Organización Mundial de la Salud. Air quality and health
http://www.euro.who.int/eprise/main/WHO/Progs/AIQ/Home/
UNECE. United Nations Economic Commission for Europe. Convention on Long-range Transboundary Air Pollution
http://www.unece.org/env/lrtap/
IETA. International Emissions Trading Association
http://www.ieta.org
Comisión Europea. Air
http://ec.europa.eu/environment/air/index_en.htm
Agencia Europea de Medio Ambiente. Air
http://themes.eea.eu.int/Specific_media/air
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