It takes life a little bit to react to these changes though, e.g plants dying and ocean life being killed off. There's a risk of cascading effects from plant/animal network collapse. I have heard people building off of your idea though and speculating that Northern areas like Russia may be valuable in the next century as new farming land.

And I don't think people should be able to downvote a question without answering, or upvoting a response that addresses some criticism, I agree it sucks.