Daniel Kammen is a distinguished Professor of Energy at the University of California, Berkeley, where he also holds positions in the Energy and Resources Group, the Goldman School of Public Policy, and the Nuclear Engineering Department. He is a renowned expert in renewable energy, energy efficiency, and environmental policy, having advised government agencies and testified numerous times before Congress on these topics.

Kammen has an impressive educational background in physics, having earned a Bachelor's degree from Cornell University and a PhD from Harvard University. He has served as a contributing or coordinating lead author on various reports of the Intergovernmental Panel on Climate Change since 1999, and the IPCC shared the 2007 Nobel Peace Prize.

Kammen is also an entrepreneur, having founded or served on the board of over ten clean energy companies. In addition, he has held top-level positions in various organizations such as the World Bank, where he served as the Chief Technical Specialist for Renewable Energy and Energy Efficiency from 2010 to 2011.

Despite his vast accomplishments and impact, Kammen is widely regarded as a humble and down-to-earth person who is passionate about using his expertise to make the world a better place. In 2016, he was even appointed as a Science Envoy for the U.S. Department of State by John Kerry. However, Kammen resigned from his position in 2017 due to his disagreement with President Trump's policies on climate change.