Keynote: Global Changes in the Environment
Jonathan
Apr 26, 20269 February 1990Raleigh, NC — NC State University
Vote
Sagan's prescient 1990 keynote on global climate change, military spending, and a sustainable energy future.
Transcript
Summary
Carl Sagan argues that global warming is a serious, evidence-based risk that policymakers should treat with the same caution used for military threats. Using Greek myths, planetary science, and climate data, he urges practical mitigation through efficiency, alternative energy, forest protection, and population stabilization.
Open the interactive transcript
Search every word, jump to any moment, and follow along with the video.
