Global Warming Debate (04:51)
Intelligence Squared U.S. Debate Forum Chairman Robert Rosenkranz outlines the devate and introduces moderator Brian Lehrer.
Debate "Housekeeping" (03:01)
Lehrer states the motion, explains the debate format, and introduces the panel members for each side.
For the Motion: Richard S. Lindzen (08:28)
MIT Alfred P. Sloan Professor of Atmospheric Sciences Richard S. Lindzen cites scientific data contradicting IPCC reports that global warming is a man-made crisis; and points out flaws in climate change models.
Against the Motion: Richard C. J. Somerville (07:57)
Scripps Institution of Oceanography, University of California Professor Richard C.J. Somerville defends IPCC science; argues that CO2 emissions have reached a critical point; and says it's too risky to bet on climate change skeptics.
For the Motion: Michael Crichton (08:05)
Writer and filmmaker Michael Crichton acknowledges that global warming is happening, but argues it isn't a crisis yet and we should prioritize poverty and disease.
Against the Motion: Gavin Schmidt (08:23)
NASA Goddard Institute for Space Studies Climate Scientist Gavin Schmidt discusses levels of scientific certainty about global warming and argues that climate skepticism is politically motivated.
For the Motion: Philip Stott (08:19)
University of London professor and biogeographer Philip Stott argues for increasing energy and water access among the world's poor, and points out environmental risks and political hypocrisy in global warming agendas.
Against the Motion: Brenda Ekwurzel (08:17)
Union Concerned Scientists Member Brenda Ekwurzel cites early warning signs of global warming and outlines economically sustainable measures to reduce emissions.
Predebate Audience Vote Results (00:40)
For: 30% - Against: 57% - Undecided: 13%.
Global Warming and Climate Stability (03:25)
Richard Linzen (for) and Brenda Ekwurzel (against) debate whether climate change could be advantageous for humans.
Global Cooling Event (02:08)
Richard Somerville (against) argues that there wasn't scientific consensus on the '70s media hype; Richard Linzen (for) points out there isn't scientific consensus today about global warming.
Scientific Consensus (06:58)
Michael Crichton (for) argues that consensus isn't proof of global warming. Gavin Schmidt (against) and Philip Stott (for) debate whether cutting edge climate science is credible.
QA: Greenhouse Emissions (02:37)
Richard Somerville clarifies that while the atmosphere is mostly water vapor, we can only control CO2 emissions. Philip Stott and Richard Linzen refute assumptions of CO2 and water vapor interaction.
QA: Sustainable Energy Solution (05:13)
Philip Stott and Brenda Ekwurzel discuss economically friendly ways to reduce emissions and stave off global warming.
QA: Climate Change Adaptation (02:29)
Brenda Ekwurzel responds to an audience question about human fragility and cites coastal cities and countries at risk of sea level rise.
QA: Albedo Effect (02:38)
Philip Stott explains how surface reflectivity is a factor in global warming, but little is known about its effects. Richard Somerville argues that we should still take climate science seriously.
QA: Prioritizing Climate Change (02:05)
Richard Somerville argues that addressing global warming will also address poverty; Michael Crichton points out that we haven't yet done so.
Concluding Statement Against: Richard Somerville (03:27)
Somerville argues that the Fossil Fuel Age will end, and urges the public to act responsibly on climate science warnings.
Concluding Statement For: Philip Stott (02:06)
Stott argues against closing down the scientific debate around climate change, and urges the public to address the energy crisis separately.
Concluding Statement Against: Gavin Schmidt (01:14)
Schmidt argues that '60s climate change predictions are coming true, and to ignore global warming effects would be irresponsible.
Concluding Statement For: Richard Linzen (01:12)
Linzen accuses the opposite side of ignoring changing data on global warming and practicing biased science.
Concluding Statement Against: Brenda Ekwurzel (08:31)
Ekwurzel argues that it makes economic sense to reduce emissions and urges a national policy to implement sustainable solutions.
Concluding Statement For: Michael Crichton (01:54)
Crichton argues that the general public shouldn’t be expected to make personal sustainability commitments until environmental leaders do.
Audience Vote Results (02:23)
Predebate For: 30% - Against: 57% - Undecided: 13% Post-debate For: 46% - Against: 42% - Undecided: 12%
Credits: Global Warming Is Not a Crisis: A Debate (00:46)
Credits: Global Warming Is Not a Crisis: A Debate
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