The 2009 endangerment finding determined greenhouse gases threaten public health and underpinned climate regulations of cars, power plants and more.

The suit challenged the Trump administration’s repeal of a scientific finding that had been the central basis for U.S. action to regulate greenhouse gas emissions and fight climate change.

A new lawsuit by 23 states and D.C. is challenging the EPA's move to rescind the legal foundation for regulations limiting greenhouse gas emissions.

The Trump administration finalized the repeal of the endangerment finding Feb. 12. A post on the EPA’s website stated the change would also dissolve restrictions on vehicle emissions and save ...