John P. Holdren

John P. Holdren is an American scientist and policy advisor specializing in environmental issues and science policy. He has contributed significantly to understanding the impact of human activity on the Earth's climate and natural resources. Holdren served as the Director of the White House Office of Science and Technology Policy under President Barack Obama, helping shape U.S. science and technology policy. His work emphasizes sustainable development, climate change mitigation, and integrating scientific knowledge into policymaking to address global challenges effectively.