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  2. National Emissions Standards for Hazardous Air Pollutants

    en.wikipedia.org/wiki/National_Emissions...

    The National Emission Standards for Hazardous Air Pollutants (NESHAP) are air pollution standards issued by the United States Environmental Protection Agency (EPA). The standards, authorized by the Clean Air Act, are for pollutants not covered by the National Ambient Air Quality Standards (NAAQS) that may cause an increase in fatalities or in serious, irreversible, or incapacitating illness.

  3. Orders of magnitude (radiation) - Wikipedia

    en.wikipedia.org/.../Orders_of_magnitude_(radiation)

    Recognized effects of higher acute radiation doses are described in more detail in the article on radiation poisoning.Although the International System of Units (SI) defines the sievert (Sv) as the unit of radiation dose equivalent, chronic radiation levels and standards are still often given in units of millirems (mrem), where 1 mrem equals 1/1,000 of a rem and 1 rem equals 0.01 Sv.

  4. United States vehicle emission standards - Wikipedia

    en.wikipedia.org/wiki/United_States_vehicle...

    Only state which still conduct emission testing dating back to the 1967 model year unlike other states using EPA classification (a few still conduct test for 1968–present (1968+ testing is for jurisdictions using defined EPA standards for vehicle classification since the '68 model year and beyond automobiles must have an exhaust emission ...

  5. National Ambient Air Quality Standards - Wikipedia

    en.wikipedia.org/wiki/National_Ambient_Air...

    The EPA elected to not modify the Pb NAAQS further, but decided to instead focus on the 1991 U.S. EPA Strategy for Reducing Lead Exposure. The EPA concentrated on regulatory and remedial clean-up efforts to minimize Pb exposure from numerous non-air sources that caused more severe public health risks, and undertook actions to reduce air emissions.

  6. Regulation of greenhouse gases under the Clean Air Act

    en.wikipedia.org/wiki/Regulation_of_greenhouse...

    Section 202(a)(1) of the Clean Air Act requires the Administrator of the EPA to establish standards "applicable to the emission of any air pollutant from…new motor vehicles or new motor vehicle engines, which in [her] judgment cause, or contribute to, air pollution which may reasonably be anticipated to endanger public health or welfare" (emphasis added). [3]

  7. Radionuclide - Wikipedia

    en.wikipedia.org/wiki/Radionuclide

    EPA – Radionuclides – EPA's Radiation Protection Program: Information. FDA – Radionuclides – FDA's Radiation Protection Program: Information. Interactive Chart of Nuclides – A chart of all nuclides; National Isotope Development Center – U.S. Government source of radionuclides – production, research, development, distribution, and ...