John Holdren

John Holdren is an American scientist and policy advisor known for his work in environmental science, climate change, and science policy. He served as a senior advisor to the U.S. President and was involved in national science and environmental initiatives. Holdren has expertise in topics like global warming, renewable energy, and technological solutions to environmental challenges. His career combines scientific research with efforts to inform and shape policies aimed at addressing complex scientific and environmental issues at the national level.