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The U.S. National Ambient Air Quality Standards (NAAQS, pronounced /ˈnæks/ naks) are limits on atmospheric concentration of six pollutants that cause smog, acid rain, and other health hazards. Established by the United States Environmental Protection Agency (EPA) under authority of the Clean Air Act (42 U.S.C. 7401 et seq.), NAAQS is applied for outdoor air throughout the country. The National Emissions Standards for Hazardous Air Pollutants cover many other chemicals, and require the maximum achievable reduction that the EPA determines is feasible.

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  • Les Normes de Qualitat de l'Aire Ambient (NAAQS) són normes establertes per l'Agència de Protecció Ambiental dels Estats Units sota l'autoritat de la Llei d'Aire Net (42 USC 7401 et seq.) que s'apliquen per a l'aire exterior a tot el país. Les normes primàries estan dissenyades per protegir la salut humana, amb un marge adequat de seguretat, incloent les poblacions més vulnerables com els nens, els ancians i les persones que pateixen de malalties respiratòries. Les normes secundàries estan dissenyades per protegir el benestar públic dels efectes adversos coneguts o anticipats d'un contaminant. (ca)
  • لجنة معايير جودة الهواء (NAAQS)، لجنة أمريكية تهتم بوضع معايير الملوثات الضارة تم انشاؤها من قبل وكالة حماية البيئة في الولايات المتحدة (EPA) تحت سلطة قانون الهواء النظيف رقم 42 بند 7401. (ar)
  • The U.S. National Ambient Air Quality Standards (NAAQS, pronounced /ˈnæks/ naks) are limits on atmospheric concentration of six pollutants that cause smog, acid rain, and other health hazards. Established by the United States Environmental Protection Agency (EPA) under authority of the Clean Air Act (42 U.S.C. 7401 et seq.), NAAQS is applied for outdoor air throughout the country. The six criteria air pollutants (CAP), or criteria pollutants, for which limits are set in the NAAQS are ozone (O3), atmospheric particulate matter, lead, carbon monoxide (CO), sulfur oxides (SOx), and nitrogen oxides (NOx). These are typically emitted from many sources in industry, mining, transportation, electricity generation and agriculture. In many cases they are the products of the combustion of fossil fuels or industrial processes. The National Emissions Standards for Hazardous Air Pollutants cover many other chemicals, and require the maximum achievable reduction that the EPA determines is feasible. (en)
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  • Les Normes de Qualitat de l'Aire Ambient (NAAQS) són normes establertes per l'Agència de Protecció Ambiental dels Estats Units sota l'autoritat de la Llei d'Aire Net (42 USC 7401 et seq.) que s'apliquen per a l'aire exterior a tot el país. Les normes primàries estan dissenyades per protegir la salut humana, amb un marge adequat de seguretat, incloent les poblacions més vulnerables com els nens, els ancians i les persones que pateixen de malalties respiratòries. Les normes secundàries estan dissenyades per protegir el benestar públic dels efectes adversos coneguts o anticipats d'un contaminant. (ca)
  • لجنة معايير جودة الهواء (NAAQS)، لجنة أمريكية تهتم بوضع معايير الملوثات الضارة تم انشاؤها من قبل وكالة حماية البيئة في الولايات المتحدة (EPA) تحت سلطة قانون الهواء النظيف رقم 42 بند 7401. (ar)
  • The U.S. National Ambient Air Quality Standards (NAAQS, pronounced /ˈnæks/ naks) are limits on atmospheric concentration of six pollutants that cause smog, acid rain, and other health hazards. Established by the United States Environmental Protection Agency (EPA) under authority of the Clean Air Act (42 U.S.C. 7401 et seq.), NAAQS is applied for outdoor air throughout the country. The National Emissions Standards for Hazardous Air Pollutants cover many other chemicals, and require the maximum achievable reduction that the EPA determines is feasible. (en)
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  • لجنة معايير جودة الهواء (ar)
  • Normes Nacionals de Qualitat de l'Aire (ca)
  • National Ambient Air Quality Standards (en)
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