Bjørn Lomborg
— Self - Director, Copenhagen Consensus Center
Hashem Akbari
— Self - Head of Heat Island Group, Berkeley Lab
Al Gore
— Self (archive footage)
James Hansen
— Self - Director, NASA Institute for Space Studies
Barack Obama
— Self (archive footage)
Barry Glassner
— Self - Sociologist, USC and Author, 'The Culture of Fear'
Richard Lindzen
— Self - Professor of Atmospheric Science, MIT
Nathan Myhrvold
— Self - Founder, Intellectual Ventures
Daniel Nocera
— Self - Professor of Energy and Chemistry, MIT
Thomas Schelling
— Self- Economist, Nobel Laureate
Jonathan Trent
— Self - OMEGA Project Scientist, NASA Ames Research Center
Joe Barton
— Self (archive footage)
John Dingell
— Self (archive footage)