In the first case the region will encounter problems as desertification, availability of water, biodiversity loss, ....
The second case imply the ruling agriculturists loose their crops; as an example imagine what Bordeaux can win planting oranges instead of his known red wine despite some opportunistic individual may do fortune with it (...).
Yesterday I finished a small paper on that theme and did a research. I read different information, research, articles, and paper examples on https://paperap.com/free-papers/global-warming/, and all that info I found proved to me once again that global warming is a danger. And people may think differently, but I'm writing what I think about all that.
No one will win, it's a fact.