I've seen it before that some people say that global warming will cause or does now cause areas to greatly cool as well. How is this true?
And this story has been debunked some time ago.
You could ask yourself why Victoria Canada has such a mild climate, without a Gulf stream
We discussed it also here: https://www.physicsforums.com/showthread.php?t=159038
But surely the myth with linger on for a while like all falsified hypotheses.