Twenty-four states have filed a lawsuit against the Environmental Protection Agency, challenging the agency's decision to repeal climate change regulations.

The lawsuit alleges that the EPA illegally repealed what is known as the endangerment finding, a scientific assessment that previously required the agency to regulate greenhouse gas emissions. This finding served as the legal foundation for federal greenhouse gas regulations.

The endangerment finding was a key regulatory mechanism that established the EPA's authority to address climate change through emissions standards. The states contend that the agency's action to reverse this assessment was conducted improperly.

The multi-state legal challenge represents a significant confrontation between state governments and federal environmental policy. The outcome of this case could have substantial implications for how greenhouse gas emissions are regulated at the federal level.

The lawsuit adds to ongoing legal battles over environmental regulations and federal climate policy. The case will likely face lengthy court proceedings as both sides present their arguments regarding the EPA's regulatory authority and the legal requirements for environmental assessments.