I'm certainly not saying nuclear war wouldn't be awful - it would be! But in judging Carl Sagan's claims, we look at what he actually wrote to the public, and

I'm certainly not saying nuclear war wouldn't be awful - it would be! But in judging Carl Sagan's claims, we look at what he actually wrote to the public, and it's the specific climate claims that Carl Sagan made that appear to be wildly incorrect.