Clean Air Act Nitrogen Oxides Politics 
Union of Concerned Scientists
DECEMBER 1, 2022
California has a longstanding leadership role on transportation pollution, and the Clean Air Act grants the state the right to set strong vehicle emissions standards. While the waiver addresses California’s ability to enforce its rules, the Clean Air Act also allows other states the ability to adopt California’s policies.
Union of Concerned Scientists
JULY 3, 2022
Had the court ruled fully in favor of the EPA— or not taken the case at all —a much more meaningful dent in power plant carbon emissions would be within reach, while also delivering much greater reductions in other dangerous co-pollutants from burning fossil fuels such as particulate matter, mercury, nitrogen oxides and sulfur dioxide.
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Union of Concerned Scientists
OCTOBER 4, 2023
However, with the oil crisis in the rear-view mirror, then-President Ronald Reagan acceded to requests from Ford and General Motors to reduce fuel economy standards for a few years, and the political will to strengthen the program petered out.
Legal Planet
MARCH 6, 2023
But with the recent influx of government incentives for hydrogen production, new and improving production and storage technologies, and greater political will than ever before, H 2 ’s reputation is gaining favor. All this is not to say there is no place for hydrogen in a clean energy future.
Legal Planet
AUGUST 22, 2023
States and local air quality regulators have the legal authority to set particulate matter (PM), ozone, and nitrogen oxides (NOx) emissions standards and adopt regulations for these pollutants when they are already in attainment of the national ambient air quality standards ( NAAQS ) set by the U.S.
Environment, Law, and History
AUGUST 27, 2023
Dan Farber at Legal Planet recently posted on "Cars, Smog, and EPA" An excerpt: For the first 20 years of federal regulation, Congress set the NOx [nitrogen oxides] standards for new cars itself. The initial standard, set in the 1970 Clean Air Act, was 3.1 EPA, 1973). grams per mile (gpm) for NOx.
Legal Planet
APRIL 24, 2025
Only the San Joaquin Valley Air Pollution Control District and the South Coast Air Quality Management District, out of Californias 35 local air districts, have adopted ISRs, despite the pervasiveness of air pollutants like nitrogen oxides (NOx) and particulate matter (PM10 and PM2.5).
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