Contributing, reviewing, validating or endorsing our website content are:
- Albert Bartlett, Ph.D., professor emeritus of physics, University of Colorado
- Betty B. Davis, Ph.D., psychologist
- Bill Smith, Ph.D., dean, College of Global Economics, EarthNet Institute
- Craig Diamond, adjunct faculty, environmental studies, Florida State University; technical advisor to the Sierra Club carrying capacity campaign
- David Pimentel, Ph.D., professor of ecology and agricultural sciences, Cornell University
- Diana Hull, Ph.D., behavioral scientist, retired, Baylor College of Medicine
- Edward G. Di Bella, adjunct faculty, Grossmont Community College (CA); president, Friends of Los Penasquitos Canyon Preserve
- George Wolford, Ph.D., president, EarthNet Institute
- Herbert Berry, Ph.D., retired associate professor of computer information systems, Morehead State University (KY)
- James G. McDonald, attorney, civil engineer
- Jeffrey Jacobs, Ph.D., National Academy of Sciences
- John Bermingham, former Colorado state senator
- John Rohe, attorney; board, Conservation News Service
- Linda Thom, retired government budget analyst, Santa Barbara County (CA)
- Michael Hanauer, member, Vision 2020, growth management project of Lexington, (MA)
- Ross McCluney, Ph.D., principal research scientist, Florida Solar Energy Center, University of Central Florida
- Steve Miller, former Las Vegas councilman, Clark County (NV) Regional Transportation Commissioner
- Stuart Hurlbert, Ph.D., professor of biology, San Diego State University
- Terry Paulson, Mayor Pro-tem, Aspen (CO) City Council
- Tom Reitter, Livermore (CA) City Council