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State Air Regulations Can Go Above and Beyond National Standards 

Legal Planet

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.

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Cars, Smog, and EPA

Legal Planet

At the high temperatures in internal combustion engines, some of the nitrogen in the air actually burns, resulting in the formation NO or NO 2 , which are collectively called NOx. NOx plays a role in forming ground level ozone and final particulates (PM2.5), both of which are human health hazards. grams per mile (gpm) for NOx.

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Improving EPA’s Latest Ozone Transport Rule

Acoel

EPA’s latest proposed rule targeting NOx emissions from fossil-fueled electric generating units (EGUs) is a classic study of diminishing returns. The downwind air quality benefits are minimal. The agency’s air quality modeling indicates that most areas would receive an ozone reduction of less than 0.1

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Why UCS Supporters Are Pressing EPA to Let California Enforce Its Truck Pollution Rules

Union of Concerned Scientists

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. We in Colorado have many days of problematic ozone. We need every tool we can apply to gain healthier air. Traffic is a major concern.

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Other 2023 N.C. Environmental Legislation

Smith Enviorment

Other air quality provisions expedite permitting and construction of new or expanded sources of air pollutants. 12.5, prohibits any state agency from requiring electric utilities to participate in a cap and trade program for CO2 emissions. ’s current ozone SIP based on vehicle emission inspections in 19 N.C.

2023 98
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EPA’s Power Plant Carbon Rules Are Critical—and Complex. Here’s What to Know, and What to Watch.

Union of Concerned Scientists

The ongoing pollution from these power plants is an affront to public health and wildly incompatible with every climate ambition this country —and this world—has. Which means the consequences of these polluters unabashedly continuing to pollute aren’t just severe—they’re compounding. So what follows from that obligation?

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After the Court Rules: Gaming out Responses to a Cutback in EPA Authority

Legal Planet

The Clean Power Plan has no practical significance today: the deadlines in the Plan have long since passed, and the U.S. The Trump Administration said that the second two prongs, involving shifts away from coal and toward renewables, went beyond EPA’s powers under the Clean Air Act.