National Ambient Air Quality Standards Archives

National Ambient Air Quality Standards

A Design Flaw in the Clean Air Act

Why have technology-based standards if you have air quality standards?

The Clean Air Act has two kinds of standards. It sounds like having two kinds of standards should improve air quality more than a single standard. But in reality, one type of standard can result in canceling out the benefits of the other type. If you understand the statute, this is actually pretty obvious once …

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Another California Regulatory Agency in Crisis: Southern California’s Air Quality Management District Fires Longtime Executive Officer

Barry Wallerstein’s Ouster from SCAQMD Signals Tilt Away from Protection of Public Health

In a move that shocked the environmental advocacy community and low-income communities of color that suffer most from the impacts of poor air quality in Los Angeles, the governing board of the South Coast Air Quality Management District fired its longtime executive officer Barry Wallerstein today, voting 7-6 in closed session to remove him from …

Continue reading “Another California Regulatory Agency in Crisis: Southern California’s Air Quality Management District Fires Longtime Executive Officer”

The Long, Slow Path to Improved Air Quality Standards

The regulatory process can be slow and tortuous. Consider the case of air quality standards. Since 1997, EPA has had separate air quality standards for fine particulates, technically called PM2.5. These tiny particles can penetrate deep into the lungs, making them a special public health concern. EPA has revisited the standard twice, in 2006 and …

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Another Posthumous Loss for the Bush EPA

Greenwire Reports: The U.S. Circuit Court of Appeals for the District of Columbia ruled that U.S. EPA’s 2006 standards for fine particulate matter were, “in several respects, contrary to law and unsupported by adequately reasoned decisionmaking.” At issue was the rule that kept the primary standard for annual fine particulate matter at 15 micrograms per …

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Delay on marine engines upheld

In the latest round in a long-running battle, the D.C. Circuit has upheld EPA’s foot-dragging on regulation of emissions from large marine diesel engines against a challenge brought by the South Coast Air Quality Management District, Santa Barbara Air Pollution Control District, and Friends of the Earth. Large ships are major sources of air pollution …

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A New Era for Protecting Public Lands

The Bureau of Land Management has always prioritized extraction activities. Now the agency has announced a rule that could elevate conservation.

Don’t Count Your Judicial Vultures Before They Hatch

The conservative Supreme Court majority may turn out as bad as we fear. Or maybe not.

Filling in the Picture: The Latest From Kennedy about Climate

Here’s what Kennedy says about his campaign, its effect on the race, and climate change.

Five Myths and Half-Truths About California Cap and Trade

California has spent years fine-tuning its trading system, with results that aren’t always easy to gauge.

U.S. Supreme Court Revisits, Tightens Regulatory Takings Limits on Land Use Regulation

California Homeowner’s Takings Challenge to County’s Traffic Impact Fee Heads Back to State Court

California Wins Major Clean Air Act/Climate Change Case in D.C. Circuit

U.S. Court of Appeals Rejects Red States’ Challenge to California’s CAA “Waiver Authority”

Shanahan, Kennedy and Climate Change: Unanswered Questions

It’s clear that RFK Jr.’s running mate has good intentions and an interest in climate issues. But not much is clear beyond that.

Power of the People: Environmental Advocacy in China

Several of China’s most prominent environmental advocates will join a keynote talk at UCLA Law on the role of civil society in addressing China’s global environmental impacts.

Not All Community Benefits Are Created Equal

Technical Assistance for Underserved, Environmental Justice, and Tribal Communities Will Be Key to Ensuring Meaningful California Offshore Wind CBAs

Climate Change and Nigeria

A population explosion. Sluggish economy. Weak governance. Serious climate impacts. What could possibly go wrong?

California Wins Major Clean Air Act/Climate Change Case in D.C. Circuit

U.S. Court of Appeals Rejects Red States’ Challenge to California’s CAA “Waiver Authority”

Florida is a Climate-Denying Hellscape

Florida lawmakers want to erase climate change from their laws and ban local heat protection ordinances ahead of what could be another summer of record-breaking heat.

The New EPA Car Rule Doesn’t Violate the Major Questions Doctrine

They both relate to climate, but West Virginia v. EPA involved a very different regulation raising very different issues.

Critical Insights on the Mineral Boom: Part III

On the rise of resource nationalism and building an equitable supply chain: Insights from the Emmett Institute’s “Powering the Future” symposium.

Will the NEPA Amendments Speed Up Permitting?

Probably not much. If at all.

Election 2024: The Current Outlook

The White House and the House are still up for grabs; Republicans are favored in the Senate.

A Word on Congestion Pricing

Time for local leaders to restart the discussion

The ‘Year of Climate’ in International Courts

Guest contributor Rebecca Hamilton previews several opinions that touch on the question of the international legal obligations of States in light of the climate emergency.

Ranking the Candidates’ Focus on Energy & Climate

Some campaign websites mention these issues only in passing. Others went into more detail.

No, EVs are Not Worse for the Planet

There’s an electric car culture war raging. It doesn’t hurt to say obvious things, like that electric cars reduce driving costs and pollute far less than gas-powered cars.

National Ambient Air Quality Standards

Why have technology-based standards if you have air quality standards?

Barry Wallerstein’s Ouster from SCAQMD Signals Tilt Away from Protection of Public Health

TRENDING

The Bureau of Land Management has always prioritized extraction activities. Now the agency has announced a rule that could elevate conservation.

The conservative Supreme Court majority may turn out as bad as we fear. Or maybe not.

Here’s what Kennedy says about his campaign, its effect on the race, and climate change.

California has spent years fine-tuning its trading system, with results that aren’t always easy to gauge.

California Homeowner’s Takings Challenge to County’s Traffic Impact Fee Heads Back to State Court

U.S. Court of Appeals Rejects Red States’ Challenge to California’s CAA “Waiver Authority”

It’s clear that RFK Jr.’s running mate has good intentions and an interest in climate issues. But not much is clear beyond that.

Several of China’s most prominent environmental advocates will join a keynote talk at UCLA Law on the role of civil society in addressing China’s global environmental impacts.

Technical Assistance for Underserved, Environmental Justice, and Tribal Communities Will Be Key to Ensuring Meaningful California Offshore Wind CBAs

A population explosion. Sluggish economy. Weak governance. Serious climate impacts. What could possibly go wrong?

U.S. Court of Appeals Rejects Red States’ Challenge to California’s CAA “Waiver Authority”

Florida lawmakers want to erase climate change from their laws and ban local heat protection ordinances ahead of what could be another summer of record-breaking heat.

They both relate to climate, but West Virginia v. EPA involved a very different regulation raising very different issues.

On the rise of resource nationalism and building an equitable supply chain: Insights from the Emmett Institute’s “Powering the Future” symposium.

Probably not much. If at all.

The White House and the House are still up for grabs; Republicans are favored in the Senate.

Time for local leaders to restart the discussion

Guest contributor Rebecca Hamilton previews several opinions that touch on the question of the international legal obligations of States in light of the climate emergency.

Some campaign websites mention these issues only in passing. Others went into more detail.

There’s an electric car culture war raging. It doesn’t hurt to say obvious things, like that electric cars reduce driving costs and pollute far less than gas-powered cars.