But we do know because thousands of hardworking scientists have devoted their lives to answering this question.
If you want to have fun speculating wildly then be clear that this is what you’re doing and don’t frame it as things that “will” happen.
Sorry this is a pet peeve of mine because I think it feeds into a paralyzing pessimism. People need to understand that we aren’t doomed to feel like they can work for a better future.
I may have stated it slightly too strongly but this is wild speculation on Hansen’s part. Show me a published prediction.
Even if what he said was accurate, burning that much fossil energy is almost certainly impossible.