Yahoo Αναζήτηση Διαδυκτίου

Αποτελέσματα Αναζήτησης

1. www.epa.gov › naaqsReviewing National Ambient Air Quality Standards (NAAQS ... - US...

   www.epa.gov › naaqs

   • Αποθηκευμένο αντίγραφο

   20 Μαΐ 2024 · The Clean Air Act requires EPA to set National Ambient Air Quality Standards (NAAQS) for six principal pollutants, called "criteria pollutants," that are common in outdoor air, considered harmful to public health and the environment, and that come from numerous and diverse sources.

   • Table

     The Clean Air Act, which was last amended in 1990, requires...

   • No2

     No2 - Reviewing National Ambient Air Quality Standards...

   • Co

     Co - Reviewing National Ambient Air Quality Standards (NAAQS...

   • SO2

     SO2 - Reviewing National Ambient Air Quality Standards...

   • Criteria Air Pollutants

     The Clean Air Act requires EPA to set National Ambient Air...

   • NAAQS Review Process

     Sections 108 and 109 of the Clean Air Act (CAA) govern the...

   • Air Pollution

     EPA in recent years revised standards for five of the six...

   • Air

     The Clean Air Act (CAA) requires EPA to set National Ambient...

2. www.epa.gov › clean-air-act-overview › air-pollution-current-and-future-challengesAir Pollution: Current and Future Challenges | US EPA

   www.epa.gov › clean-air-act-overview › air-pollution-current-and-future-challenges

   • Αποθηκευμένο αντίγραφο

   23 Οκτ 2023 · EPA in recent years revised standards for five of the six common pollutants subject to national air quality standards. EPA made the standards more protective because new, peer-reviewed scientific studies showed that existing standards were not adequate to protect public health and the environment.

3. www.epa.gov › regulatory-and-guidance-information-topic-airRegulatory and Guidance Information by Topic: Air | US EPA

   www.epa.gov › regulatory-and-guidance-information-topic-air

   • Αποθηκευμένο αντίγραφο

   23 Μαΐ 2024 · The Clean Air Act (CAA) requires EPA to set National Ambient Air Quality Standards (NAAQS) for six common air pollutants. EPA must designate areas as meeting (attainment) or not meeting (nonattainment) the standard.

4. www.epa.gov › clean-air-actOverview of the Clean Air Act and Air Pollution | US EPA

   www.epa.gov › clean-air-act

   • Αποθηκευμένο αντίγραφο

   5 Ιουλ 2024 · On November 15, 1990, the Clean Air Act was revised to curb four major threats to the environment and to the health of millions of Americans: acid rain, urban air pollution, toxic air emissions, and stratospheric ozone depletion.

5. www.epa.gov › haps › reducing-emissions-hazardous-air-pollutantsReducing Emissions of Hazardous Air Pollutants | US EPA

   www.epa.gov › haps › reducing-emissions-hazardous-air-pollutants

   • Αποθηκευμένο αντίγραφο

   6 Μαρ 2024 · These steps include: reducing toxic emissions from industrial sources; reducing emissions from vehicles and engines through new stringent emission standards and cleaner burning gasoline; and addressing indoor air pollution though voluntary programs.

6. www3.epa.gov › airquality › emissnsAir Pollution Emissions Overview | Air Quality Planning &...

   www3.epa.gov › airquality › emissns

   • Αποθηκευμένο αντίγραφο

   In order to make improvements in the air quality, the amount of pollutants in the air must be measured. The Emissions Measurement Center develops standards and evaluates testing methods so that regulations can be developed and enforced.

7. www3.epa.gov › airquality › emissionAir Pollution Emissions | Air Quality Planning & Standards | US...

   www3.epa.gov › airquality › emission

   • Αποθηκευμένο αντίγραφο

   The National Air Pollutant Emission Trends report presents the latest estimates of national and regional emissions for criteria air pollutants. Estimates are presented for the years 1900 to 1996, with greater detail in more recent years.