Dozens of U.S. States Sue EPA to Block Rollback of Key Greenhouse Gas Rule

More than 20 U.S. states along with city and county governments have filed a lawsuit against the Trump administration's EPA to block the rescission of the 2009 Endangerment Finding. This finding classifies carbon dioxide as a threat to public health and welfare, underpinning greenhouse gas emission regulations. The case will determine whether the EPA retains authority to regulate emissions, with broad implications for U.S. climate policy and environmental protections.