There is all kinds of activity happening because of the opening of the north west passage including billion dollar bets like this one. But the global warming deniers keep denying. It's baffling.
Climate scientists try to figure out whether this could affect global climate, and many say it can and probably is. This latter thing is what is being ignored.
Incidentally it was "global warming" that ended the last ice age. Now it's on YOU to show how humans were responsible...