It’s always 30 years away. Just long enough to be unprovable.
You noticed that too? Close enough to give a “chill” and too far to make it irrelevant. They can’t even offer a weather forecast beyond the afternoon. We’re all doooooooomed. Submit Submit!!!!!!1
Friend of mine once called this type of prediction a “bow wave.” Always out there in the front, but can’t quite reach it.
On the plus side, the opening of the NW Passage would prevent the burning of millions of tons of Bunker C fuel in oceanic freighters. That would have huge environmental benefits!