Trump to undo Obama auto emissions rules: official

President Donald Trump is set to announce steps Wednesday to halt his predecessor Barack Obama's future vehicle emissions limits for manufacturers, a senior administration official said.

EPA chief: Carbon dioxide not primary cause of warming

The new chief of the Environmental Protection Agency said Thursday he does not believe that carbon dioxide is a primary contributor to global warming, a statement at odds with mainstream scientific consensus and his own agency.

Mercury levels in Hawaiian bigeye, yellowfin tuna rising

Mercury concentrations in Hawaiian-caught bigeye and yellowfin tuna are steadily rising and mirror increases in North Pacific waters that have been linked to atmospheric mercury emissions from Asia.

Trump set to roll back federal fuel-economy requirements

The Trump administration is moving to roll back federal fuel-economy requirements that would have forced automakers to increase significantly the efficiency of new cars and trucks, a key part of former President Barack Obama's ...

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