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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
