23 States Challenge Trump's Repeal of Key Climate Finding

Mar 20, 2026, 2:28 AM
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A coalition of 23 states has filed a legal petition against the Trump administration's decision to revoke a scientific finding that underpins US climate regulations. This action, initiated in the US Court of Appeals for the District of Columbia, is led by California and New York, along with support from nine cities, several counties, the US Virgin Islands, and the District of Columbia.
The petition targets the "endangerment finding," a determination made in 2009 that identified climate change as a threat to public health and the environment. This finding has been critical for establishing regulations aimed at reducing greenhouse gas emissions and promoting renewable energy sources. Critics of the Trump administration argue that the revocation is a significant setback in the fight against climate change and a favor to the fossil fuel industry.
California Attorney General Rob Bonta expressed strong opposition to the repeal, stating, "The president is choosing Big Oil profits over our health, and betting that the American people won't notice the cost until the bill comes due". New York State Attorney General Letitia James also criticized the action, claiming it represents a denial of the reality of climate change and an abandonment of critical protections necessary for public health and welfare.
The lawsuit comes in the wake of President Trump's declaration on February 12 to rescind the endangerment finding, which he described as the "single largest deregulatory action in US history." This characterization has been met with skepticism, as environmental advocates warn that the move fundamentally undermines the EPA's ability to regulate harmful emissions effectively, which could lead to increased pollution and public health risks.
In addition to the states' lawsuit, over a dozen health and environmental organizations, including the American Public Health Association and the Environmental Defense Fund, have also initiated legal action against the Environmental Protection Agency (EPA). These groups argue that the rollback of the endangerment finding violates the Clean Air Act and disregards years of scientific consensus on the dangers posed by climate change.
The endangerment finding originated from the 2007 Supreme Court ruling in Massachusetts v. EPA, which mandated that the EPA must regulate greenhouse gases if they are found to endanger public health. The 2009 finding confirmed that emissions from vehicles, power plants, and other industrial sources pose significant health threats. Critics of the Trump administration argue that the repeal of this finding will lead to increased emissions and exacerbate ongoing public health crises exacerbated by climate change, such as heat waves and poor air quality.
Health experts have warned that the repeal is not just a regulatory issue but a public health crisis. Dr Georges Benjamin, executive director of the American Public Health Association, stated that this action will "exacerbate the health threats we are already seeing from climate change, including increased heat waves, more air pollution, and deadly wildfires".
The legal battle appears poised to escalate, as multiple states and organizations gear up to challenge the EPA's decision. Massachusetts Attorney General Andrea Campbell has vowed to lead efforts to counteract what she describes as an unlawful attempt to withdraw federal protections against greenhouse gas emissions, while California and other states are also preparing lawsuits to defend public health and environmental standards.
As the litigation unfolds, the implications of the Trump administration's actions on climate policy and public health remain deeply contentious. Many advocates argue that the rollback of the endangerment finding signals a broader trend of undermining environmental protections, which could have long-lasting effects on both the climate and public health across the nation. The outcomes of these legal challenges may ultimately shape the future landscape of US climate policy and regulatory authority for years to come.
The coalition of states and advocacy groups is determined to fight against the rollback, emphasizing that the science on climate change is clear and that regulatory frameworks established under the Clean Air Act are crucial for safeguarding public health and welfare in the face of a growing climate crisis.
The legal ramifications of this case could extend beyond the immediate challenges to the EPA's authority, potentially setting precedents that affect how climate regulations are developed and enforced in the future, as well as influencing broader public health policies in the context of environmental protection.

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