John Holdren

John Holdren is a climate scientist and former administrator of NASA. He served as the director of the White House Office of Science and Technology Policy during the Obama administration. Holdren has also worked as a professor at Harvard University and has written extensively on climate change and space policy. He is a strong advocate for increased investment in space exploration and has been a vocal critic of climate change denial. Holdren has a Ph.D. in physics from the Massachusetts Institute of Technology. He is based in Cambridge, Massachusetts.