Although there are currently no living rainforests in the Arctic, there were millions of years ago. According to new research, the Arctic was a thriving rainforest about 50 million years ago. So there ya go and most of the US was under water,, so things change never the same, our short time on earth is just a blink of an eye in the scheme of things
Present day Sahara Desert was once a green forest. Man had nothing to do with that either and it wasn't all that long ago.
Weather is cyclical....always has been. Does Man's pollution have some effect on the atmosphere....sure. Is THIS the cause of 'Global Warming' and spell the doom of mankind. I have serious doubts...and even less faith in 'scientists' with agendas.