The EPA’s 2025 decision to rescind the 2009 Endangerment Finding is being called one of the largest deregulatory actions in US history. But what exactly is the Endangerment Finding, and why do supporters say this change matters for American families and businesses?
In this Fast Facts breakdown, we explain the 16-year history of greenhouse gas regulation under the Clean Air Act, from the Supreme Court’s Massachusetts v. EPA decision to Administrator Lee Zeldin’s recent proposal to reverse course.
🕐 TIMESTAMPS:
0:00 – What is the EPA Endangerment Finding?
0:14 – Origins: 2009 Obama Administration Decision
0:48 – What Changed in 2025
1:00 – Why Supporters Say It’s Good
1:58 – Bottom Line Impact
🔍 KEY TOPICS COVERED:
✅ Clean Air Act greenhouse gas regulations
✅ Massachusetts v. EPA Supreme Court case
✅ Electric vehicle mandates (70% by 2032)
✅ Climate model accuracy vs. observations
✅ Economic impact of federal environmental regulations
✅ Congressional approach to CO2 emissions
📊 SOURCES & LINKS:
EPA Proposed Rule: https://www.epa.gov/system/files/documents/2025-07/nprm-12712-01-oar-vehicle-rule-reg-preamble-2025-0729.pdf
DOE Climate Review Report: https://www.energy.gov/sites/default/files/2025-07/DOE_Critical_Review_of_Impacts_of_GHG_Emissions_on_the_US_Climate_July_2025.pdf
U.S. Emissions Impact Analysis: https://www.texaspolicy.com/wp-content/uploads/2025/06/2025-06-LP-Materiality-of-US-CO2-Emissions.pdf