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