The article points out that it’s not a new idea … it became fashionable back in the early 1800s. But it became completely -possible- by the time Sagan started talking about nuclear winter. That even inspired a couple of movies showing how much fun it would be.

So yeah, climate change would be a low slower. But have we been keeping our eyes on that Doomsday Clock? It reached 90 seconds to midnight 1-1/2 years ago. https://en.wikipedia.org/wiki/Doomsday_Clock

Climate change wud be preferable … it at least gives us a chance to change into warmer socks, and fix the boat.