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NASA chief fully accepts dominant human role in global warming

NASA administrator Jim Bridenstine seen before a rocket launch on May 5, 2018.
NASA Administrator Jim Bridenstine watches the launch of NASA's InSight spacecraft on May 5, 2018 at NASA Headquarters in Washington. Credit: Aubrey Gemignani/NASA via Getty Images.

NASA Administrator Jim Bridenstine on Wednesday endorsed the findings of a major federal report — which reflects the wider scientific consensus — that human activities are the main driver of global warming.

Why it matters: Bridenstine's remarks before a Senate Appropriations panel make him the first top Trump administration official to publicly and fully agree that humans have been the dominant cause of warming.