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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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EPA Will Reconsider the Ozone NAAQS — What Is An Adequate Margin of Safety, Anyway?

Law and Environment

On Friday, EPA announced that it was reconsidering its 2020 decision to leave the National Ambient Air Quality Standards for ozone unchanged. However, EPA stated that it: will reconsider the decision to retain the ozone NAAQS in a manner that adheres to rigorous standards of scientific integrity.

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Clean Air Act turns 50

Environment, Law, and History

But the Clean Air Act has nonetheless had a major impact. Here’s what EPA has to say on the subject — and remember, this is from the Trump EPA, which is no fan of regulation: Experience with the Clean Air Act since 1970 has shown that protecting public health and building the economy can go hand in hand.

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The US Supreme Court is Operating Like a Rogue EPA

Union of Concerned Scientists

The plan cuts power plant and industrial ozone pollution that wafts from central parts of the nation into eastern states. According to the American Lung Association, nearly 120 million people in the nation—one of every three—lives with unhealthy levels of particle and ozone pollution. A 40-year-old Supreme Court ruling (Chevron v.

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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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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. Over 10,000 UCS supporters chimed in with EPA in support of granting California’s ability to enforce its truck regulations. We need you to do even better!

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The Mystery of the Missing Stay Order

Legal Planet

Chief Justice Roberts requested an immediate government response. It really is just as dull as it sounds — an utterly routine squabble over a run-of-the-mill EPA regulation. And about whether other litigation undermined the basis for the regulation. That was six weeks ago. Since then. You’d be wrong about that.

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