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://europa.eu.int/comm/environment/air_en.htm

Agencia Europea de Medio Ambiente. Air

http://themes.eea.eu.int/Specific_media/air