Jeff Bridges
Self / Narrator (voice)
Piers Sellers
Self - NASA Astronaut & Research Scientist
Wesley Clark
Self - General, US Army (ret.); Former NATO Supreme Allied Cmdr.
Oren R. Lyons
Self - Dist Prof of American Studies, Onondaga Council of Chiefs
Timothy Morton
Self - Philosopher & Author, 'Humankind'
Bob Inglis
Self - Former Congressman (R), South Carolina
Rich Pancost
Self - Professor of Biogeochemistry
Ruth Gates
Self - Marine Biologist; Dir. Hawaii Institute of Marine Biology
Renée Lertzman
Self - Author, ‘Environmental Melancholia’
Leonard Mlodinow
Self - Physicist
Bruce Hood
Self - Prof of Developmental Psychology, Univ of Bristol, UK
Mark Plotkin
Self - Ethnobotanist, Amazon Conservation Team
Amy Jacobson
Self - Evolutionary Anthropologist, Human Behavioral Ecologist
Daniel Goleman
Self - Psychologist, Science Journalist, Author
Stephan Lewandowsky
Self - Professor of Cognitive Psychology, University of Bristol
Nate Hagens
Self - Director, Instit. for the Study of Energy & Our Future
Joseph Tainter
Self - Professor of Anthropology, Author
Ugo Bardi
Self - Prof of Physical Chemistry, Univ of Florence, Italy
Paul Roberts
Self - Journalist; Author, 'The Impulse Society'
Ian Robertson
Self - Cognitive Neuroscientist, Trinity College, Univ of Dublin
