Nuclear Winter with Ann Druyan and Brian Toon

What It Covers

Nuclear winter research from the 1980s revealed that nuclear war would cause global extinction through atmospheric smoke blocking sunlight, dropping temperatures below freezing worldwide, and triggering mass starvation within sixty days of stored food supplies.

Key Questions Answered

• •Smoke stratosphere persistence: Nuclear explosions ignite city firestorms that inject smoke into the stratosphere where no rain exists to wash it out, keeping particles suspended for years and blocking sunlight to create moonless-night darkness at noon globally.
• •Global agricultural collapse: Models show Iowa and Ukraine breadbaskets would experience below-freezing mean low temperatures daily for several years post-attack, eliminating mid-latitude farming while only sixty days of grain storage exists worldwide before mass starvation begins across all nations.
• •Regional war global impact: A nuclear exchange between India and Pakistan using 100 weapons would kill 50-100 million initially but cause 1-2 billion deaths worldwide through climate disruption, while US-Russia war would kill approximately 5 billion people from agricultural failure and starvation.
• •Geopolitical influence mechanism: Carl Sagan briefed Pope, Soviet Central Committee, and published in Parade Magazine reaching 70 million Americans, directly influencing Gorbachev who carried the article to Reagan, contributing to 1986 Intermediate Range Nuclear Forces Treaty and subsequent arsenal reductions.