In a significant policy shift, the U.S. Environmental Protection Agency (EPA) has rolled back a critical finding made in 2009 that recognized greenhouse gas emissions as a threat to public health. This decision, by EPA Administrator Lee Zeldin, marks a departure from over a decade of regulatory actions aimed at mitigating climate change impacts.
Implications for the Clean Air Act
The 2009 endangerment finding, rooted in the Supreme Court’s 2007 decision in Massachusetts v. EPA, served as the legal underpinning for regulating greenhouse gases (GHGs) under the Clean Air Act. According to Daniel Esty, Hillhouse Professor of Environmental Law and Policy at Yale, the rescission jeopardizes this foundation. Esty states, “If upheld after legal challenges, EPA Administrator Lee Zeldin’s decision to rescind the 2009 endangerment finding takes away the legal basis for regulating GHG emissions.” Despite this rollback, the six pollutants explicitly named in the Clean Air Act remain subject to regulation, indirectly affecting GHG emissions policies.
Consequences for Environmental Policy
The immediate consequence of this decision is a halt to federal regulation of GHG emissions from vehicles and potentially power plants. Esty explains that the long-term impact hinges on the legal outcomes of forthcoming court cases. The EPA’s rejection of previous climate science could lead to a significant shift in regulatory authority, potentially requiring new congressional legislation to address GHGs should the Supreme Court align with the administration’s stance.
Impact on American Lives
Jennifer Marlon, a senior research scientist, outlines the potential effects on everyday Americans: increased difficulty in monitoring pollution, heightened risks for farmers due to volatile weather, and challenges in obtaining insurance due to climate-related risks. Furthermore, Esty notes that the administration’s focus on fossil fuels is affecting the clean energy sector, with automakers and wind power producers facing new hurdles.
Future Directions for Climate Action
Despite these challenges, efforts towards a sustainable future persist. Esty highlights that over 90% of new electricity generation in 2025 came from renewable sources. While growth may slow, many private-sector entities continue to view renewable energy as central to economic development. Meanwhile, local governments and international players are stepping up their climate commitments as federal leadership wanes.
Marlon emphasizes continued public support for climate regulation, noting that “three-quarters of Americans want the government to regulate carbon dioxide as a pollutant.” As policy diverges from public sentiment, the work of cities, states, businesses, and researchers remains steadfast, driven by scientific consensus and public will.
This article is presented in collaboration with the Yale School of the Environment.
Original Story at www.courant.com