Summary of "Trump’s Move to Kill the Clean Air Act’s Climate Authority, Forever"

Podcast: Shift Key with Robinson Meyer and Jesse Jenkins
Host/Authors: Robinson Meyer (Heatmap News Executive Editor) and Jesse Jenkins (Professor of Energy Systems Engineering at Princeton University)
Guest: Jodi Freeman (Professor of Law at Harvard Law School)
Release Date: August 6, 2025

Introduction to the Endangerment Finding

[00:00 - 03:35]
Robinson Meyer introduces the episode’s focus on the Environmental Protection Agency (EPA) attempting to rescind its longstanding Endangerment Finding under the Clean Air Act. This finding previously established carbon dioxide as a dangerous pollutant, mandating its regulation. The discussion is set to explore the mechanics of the EPA’s argument, its potential shortcomings, and the broader implications for U.S. climate regulation.

Key Quote:
"EPA has announced that it's going to rescind the scientific and legal predicate for all federal rules trying to limit greenhouse gas pollution." — Jodi Freeman [03:35]

Understanding the Endangerment Finding

[03:35 - 08:35]
Jodi Freeman provides a comprehensive overview of the Endangerment Finding, established in 2009 under the Obama administration. This scientific determination recognized greenhouse gases as pollutants harmful to public health and welfare, forming the cornerstone for various EPA regulations across multiple sectors, including power plants, vehicles, and oil and gas facilities.

Key Quotes:

• "Greenhouse gases accumulating in the atmosphere causes a variety of harms... we must regulate them." — Jodi Freeman [03:35]
• "If you pull that out, you're essentially pulling out the legal basis for all these rules." — Jodi Freeman [06:20]

Historical Context and Previous Regulatory Attempts

[06:35 - 10:53]
Freeman recounts the Obama administration’s efforts to implement the Endangerment Finding and subsequent regulations, including engaging with the auto industry to establish greenhouse gas standards. Under the Trump administration, there were attempts to weaken these regulations, primarily targeting the power sector by replacing the Clean Power Plan with less stringent rules, without challenging the fundamental classification of greenhouse gases as pollutants.

Key Quotes:

• "The George W. Bush administration said, yeah, we're not going to do it, going to run out the clock." — Jodi Freeman [07:27]
• "They replaced it with a proposed rule that was just very, very toothless, very weak." — Jesse Jenkins [08:51]

Trump Administration’s New Proposal to Rescind the Endangerment Finding

[10:53 - 19:15]
The Trump administration escalates its efforts by directly targeting the Endangerment Finding, arguing that greenhouse gases should not be classified as dangerous pollutants. Freeman outlines the administration’s primary and backup arguments:

1. Primary Argument: Greenhouse gases are global pollutants, not local, and therefore their regulation under the Clean Air Act is unfounded. Additionally, the administration contends that emissions from the transportation sector are too insignificant to warrant regulation.

2. Backup Argument: The scientific consensus is flawed, citing a Department of Energy (DOE) report that questions established climate science and suggests global warming may be beneficial.

Key Quotes:

• "They are saying greenhouse gases are not a dangerous pollutant... they're misunderstanding the local versus global nature of CO₂." — Jodi Freeman [12:11]
• "Their backup argument is the science is no longer reliable... all we know now is global warming is beneficial." — Jodi Freeman [17:28]

Legal Implications and Supreme Court’s Role

[19:15 - 26:00]
Freeman discusses the likelihood of the Trump administration’s proposal passing judicial scrutiny, particularly under the "arbitrary and capricious" standard. She expresses skepticism about the proposal’s ability to withstand legal challenges due to its departure from established scientific consensus and Supreme Court precedents like Massachusetts v. EPA (2007). Jenkins adds that recent Supreme Court decisions, such as the overturning of Chevron deference in Loper Bright, complicate the administration’s legal strategy.

Key Quotes:

• "The court in the past has said something's arbitrary capricious... they have a lot of gaps in the logic." — Jodi Freeman [23:01]
• "They are making a legalistic, performative argument that the science is flawed." — Jodi Freeman [19:41]

Broader Impact on Clean Air Act and Climate Policy

[26:00 - 38:33]
The discussion shifts to the Clean Air Act’s effectiveness and limitations. Freeman emphasizes the Act’s strength in setting technology-driven standards across sectors but laments the administration’s actions, which undermine its foundational role in regulating greenhouse gases. Meyer reflects on the historical attempts to introduce comprehensive climate legislation, like cap-and-trade, which failed to pass Congress, leaving the Clean Air Act as the primary tool for climate regulation.

Key Quotes:

• "The Clean Air Act is our major tool for controlling greenhouse gases, for trying to address climate change." — Jodi Freeman [06:20]
• "If you think the US should be providing fossil fuels as cheaply to the developing world as possible, then you should be consuming as few as we can." — Jesse Jenkins [43:39]

Future Scenarios and Legislative Alternatives

[38:33 - 56:16]
Freeman and Jenkins explore potential outcomes depending on whether the Trump administration successfully rescinds the Endangerment Finding. They discuss two scenarios:

1. Final Rescission of the Endangerment Finding: This would eliminate the legal basis for greenhouse gas regulations under the Clean Air Act, potentially opening the door for federal common law suits against major polluters.

2. Supreme Court Upholds the Rescission: If the court supports the administration’s position, it could permanently restrict EPA’s authority, shifting the burden of climate regulation to legislative actions like carbon pricing or targeted subsidies.

Freeman advocates for a multifaceted policy approach, including carbon taxes and sector-specific regulations, to address climate change more effectively.

Key Quotes:

• "If the court says no EPA has the authority to regulate greenhouse gases, we're not changing the definition of pollutant." — Jodi Freeman [53:51]
• "What happened to carbon tax? What happened to some kind of maybe a sector by sector approach?" — Jodi Freeman [46:42]

Conclusion and Policy Recommendations

[56:16 - 66:16]
In concluding the discussion, Freeman underscores the importance of retaining the Clean Air Act as a regulatory tool while also pursuing additional legislative measures to address climate change comprehensively. She highlights the Clean Air Act’s flexibility in setting technology-driven standards and its potential to drive sectoral improvements in emissions reductions. Jenkins adds that a diverse policy toolkit, including subsidies, penalties, and R&D incentives, is essential for a holistic approach to decarbonization.

Key Quotes:

• "The Clean Air Act's approach to setting standards for cars and trucks is really sensible." — Jodi Freeman [57:39]
• "You don't need to think climate if you think the US should be providing fossil fuels as cheaply to the developing world as possible." — Jesse Jenkins [43:39]

Key Takeaways

1. EPA’s Rescission of the Endangerment Finding: The Trump administration’s move to revoke the EPA’s Endangerment Finding challenges the legal foundation for regulating greenhouse gases under the Clean Air Act, potentially halting federal climate regulations.

2. Legal and Scientific Controversies: The administration employs both primary legal arguments and secondary scientific critiques to justify the rescission, though these are unlikely to withstand judicial scrutiny based on established scientific consensus and past Supreme Court decisions.

3. Impact on Climate Policy: Removing the Endangerment Finding could severely undermine the Clean Air Act’s effectiveness in addressing climate change, necessitating alternative legislative actions and a diverse policy approach to maintain progress in emissions reductions.

4. Future of Climate Regulation: The episode emphasizes the need for comprehensive climate legislation, such as carbon pricing and sector-specific regulations, to complement the Clean Air Act and ensure robust climate action irrespective of administrative shifts.

Notable Quotes with Attributions

• “EPA has announced that it's going to rescind the scientific and legal predicate for all federal rules trying to limit greenhouse gas pollution.” — Jodi Freeman [03:35]

• “Greenhouse gases accumulating in the atmosphere causes a variety of harms... we must regulate them.” — Jodi Freeman [03:35]

• “They are saying greenhouse gases are not a dangerous pollutant... they're misunderstanding the local versus global nature of CO₂.” — Jodi Freeman [12:11]

• “Their backup argument is the science is no longer reliable... all we know now is global warming is beneficial.” — Jodi Freeman [17:28]

• “The court in the past has said something's arbitrary capricious... they have a lot of gaps in the logic.” — Jodi Freeman [23:01]

• “The Clean Air Act's approach to setting standards for cars and trucks is really sensible.” — Jodi Freeman [57:39]

This episode of Shift Key delves deeply into the Trump administration’s strategies to undermine the EPA’s authority to regulate greenhouse gases, examining the legal, scientific, and policy ramifications. Through expert analysis, the discussion highlights the fragility of existing climate regulations and underscores the urgent need for comprehensive legislative measures to counteract such regulatory rollbacks.