This 12-minute video shows students how the U.S.-Soviet nuclear escalation of the 1980s gave rise to a nationwide nuclear freeze movement that challenged assumptions that had for decades guided the American approach to the Cold War. Focusing on the scientific debate over whether any nuclear exchange would be sufficient to trigger a global climate catastrophe, the video helps students draw a line between past fears of a nuclear winter and current fears of a climate crisis. The video gives context for nuclear tensions in the Cold War’s last decade, and can set up an engaging classroom discussion about the connections between the ways Americans confronted the threat of nuclear proliferation in the 1980s, and how they are responding to the threat posed by climate change today.
Could We Geoengineer Ourselves Out of Climate Change?
Is geo-engineering the climate an answer to global warming? Cold War science has some lessons.
In 1983, scientists gave the world a new reason to fear nuclear war. It had long been assumed that the immediate, direct effects of a nuclear blast would cause a devastating loss of life, and that radioactive fallout would linger. But these scientists stressed that smoke from nuclear-ignited cities might affect something far more remote — the climate around the globe.
What they found was harrowing. Their models showed that smoke from burning cities and forests could loft high into the atmosphere, shrouding the world in a twilight at noon. Freezing temperatures would kill crops, causing mass starvation and social unrest, and possibly lead to the extinction of mankind.
Called Nuclear Winter, this theory became a heated scientific topic, a pawn in Cold War brinksmanship and a lesson in how scientific understanding changes over time. But decades after detente finally ended the Cold War, it is clear that Nuclear Winter continues to raise new questions — not only about the devastation that would follow nuclear war, but also more fundamental ones about man’s ability to alter the earth’s climate, for both good and ill.
View full episodes at PBS.org/RetroReport.
Related: Global Warming Gives Science Behind Nuclear Winter a New Purpose by Clyde Haberman
Additional Resources:
“Nuclear Winter: Global Consequences of Multiple Nuclear Explosions” by Carl Sagan, et al., 1983
“Long-term Biological Consequences of Nuclear War” by Paul R. Ehrlich, et al., 1983
“The Soviet Approach to Nuclear Winter” CIA Interagency Intelligence Assessment, 1984
“The Effects on the Atmosphere of a Major Nuclear Exchange” Committee on the Atmospheric Effects of Nuclear Explosions, National Research Council, 1985
“Global Atmospheric Effects of Nuclear War,” Energy and Technology Review, 1985
“Nuclear Winter Reappraised” by Starley L. Thompson and Stephen H. Schneider, 1986
“Atmospheric and Climatic Consequences of a Major Nuclear War: Results of Recent Research” by G. S. Golitsyn, and M. C. MacCracken, 1987
“Nuclear Winter: Science and Politics” by Brian Martin*, 1988*
“Nuclear Winter Theorists Pull Back” by Malcolm W. Browne, 1990
“Climate and Smoke: An Appraisal of Nuclear Winter” by Carl Sagan et al., 1990
“Nuclear Winter in the Post-Cold War Era” by Carl Sagan and Richard P. Turco, 1993
“Nuclear Winter Revisited with a Modern Climate Model and Current Nuclear Arsenals: Still Catastrophic Consequences” by Alan Robock, Luke Oman, and Georgiy L. Stenchikov, 2007
Interactive comment on “Atmospheric effects and societal consequences of regional scale nuclear conflicts and acts of individual nuclear terrorism” by O. B. Toon et al. By M. MacCracken, 2007
Interactive comment on “Climatic consequences of regional nuclear conflicts” by A. Robock et al. By M. MacCracken, 2007
“Environmental Consequences of Nuclear War” by Owen B. Toon, Alan Robock, and Richard P. Turco, 2008
“Nuclear winter was and is debatable” by Russell Seitz, July 2011
- Lesson plan 1: The End of the Cold War: Nuclear Winter
- Read transcript
- Producer: Kit R. Roane
- Producer: Sarah Weiser