James J. Provenzano is the president of Clean Air Now, one of the oldest air quality advocacy organizations in the country, and is a leading expert in the field of hydrogen and renewable energy. As manager of Xerox Corporation's environmental programs, he played a key role in developing and managing the early hydrogen-fuel infrastructure in California, contributing to the U.S. Department of Defense study on the technological feasibility of using renewable hydrogen to fuel vehicles. Provenzano graduated from Boston College and holds Master's and Candidate in Philosophy degrees in biology from UCLA. He is a resident of Los Angeles.

Geoffrey B. Holland is the EMMY-award winning producer of Renewable Power: Earth's Clean Energy Destiny (1998). He has been writer, producer, and/or directed twelve documentaries and educational videos, half of which focus on renewable energy and hydrogen. Holland has traveled to many parts of the world, documenting civilizations' exploitation and overuse of Earth's resources. In 1995, with William Hoagland, Holland cofounded Hydrogen 2000, Inc., a nonprofit organization focused on drawing the media's attention to clean, renewable forms of energy. A graduate of Kansas State University, Holland went on to advanced studies in bio-medical sciences at the University of Washington. He currently lives with his wife, Jennifer, in Oregon.