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Obama’s Top Scientist Explains the Climate Challenge Ahead

President Obama meets with John Holdren, Office of Science and Technology Policy, in the Oval Office prior to Stem Cell Executive Order “Removing Barriers to Responsible Scientific Research Involving Human Stem Cells” and Presidential Memorandum on Scientific Integrity, March 9, 2009. (Official White House Photo by Pete Souza)

Photo Credit: Pete Souza/White House

John Holdren is the longest-serving presidential science adviser in U.S. history. He’s also probably one of the most influential, having advised President Obama on key energy issues for the last eight years. “Mr. Holdren has this president’s ear,” is how The New York Times put it in 2014.
A physicist by training, Holdren is among the chief architects of the Obama administration’s Climate Action Plan.
This makes him one of the more controversial science advisers, as well. The plan has been lauded by environmentalists, but is loathed by conservative…