The Trump administration announced its proposal on Thursday to freeze anti-pollution and fuel-efficiency standards for cars, weakening a signature Obama era policy to combat global warming. California and 18 other states vowed to fight the proposal to protect the environment for future generations. The proposal could become a polarizing issue in November elections.
The Environmental Protection Agency has dismissed at least five members of a major scientific review board, the latest signal of what critics call a campaign by the Trump administration to shrink the agency’s regulatory reach by reducing the role of academic research. In recent weeks, the agency has removed some scientific data on climate change from its websites, and Scott Pruitt, the E.P.A. administrator, has publicly questioned the established science of human-caused climate change.