U.N. Panel Warns of 'Severe and Irreversible' Effects of Climate Change

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 (Niels Ahlmann Olesen/AFP/Getty Images)

On Sunday, the United Nations released one of its bluntest and bleakest reports to date on the dangers of global warming. The study from The Intergovernmental Panel on Climate Change (IPCC) warns that the world must cut nearly all greenhouse gas emissions by 2100 in order to head off the worst effects of climate change. U.N. Secretary General Ban Ki-moon urged world leaders to act, saying that the science is unambiguous. We speak with three authors of the report about future impacts of climate change and what can be done about it.


Michael Oppenheimer, professor of geosciences and international affairs at the Woodrow Wilson School and Department of Geosciences at Princeton University and an author of the new IPCC report

Katharine Mach, co-director of science for the IPCC Working Group II, based at the Carnegie Institute for Science at Stanford

Gary Yohe, professor of economics and environmental studies at Wesleyan University, co-author of the IPCC report and vice chair of the National Climate Assessment Development and Advisory Committee

Eric Holthaus, meteorologist, Slate.com