This keynote speech of the great Carl Sagan dates back to when global warming was starting to attract public attention.
In it he dicusses the Greenhouse Effect and mentions the small changes in average global temperature that are needed to bring about big changes. He also mentions positive feedbacks.
His solutions made more sense 38 years ago when we still had plenty of oil and the economy was still functional.
1990 was a time when people still told the truth. Just look at the presenter and compare them with the disgusting presstitutes of today.
Carl Sagan was a great man. The science man, Bill Nye does not even begin to hold a torch to Carl Sagan.
Carl Sagan on Climate as an Emerging Issue (1990)
Carl Sagan's 2/9/1990 keynote speech before the 5th Annual Emerging Issues Forum at NCSU, broadcast live on North Carolina Public Television. Introduction by Roy Park of Park Communications. Recorded by Dr. Woody Sugg on a home VCR. Sagan spoke at the invitation of Jim Hunt, former NC Governor and the founder of the Institute for Emerging Issues.