[AlexandrB]

Mostly likely scenario: all-out war for resource or land.

> Or maybe everyone will simply move to Canada, Russia, Greenland and Antarctica.

So, which country is going to invade Canada to force them to allow in all these migrants? Or do you think they'll just do it willingly when people were screaming about 10,000 Syrian refugees? At the rate that global warming is progressing, there's no time for this kind of massive re-settlement without equally massive geopolitical upheaval.

> Either the Earth's systems will adapt...

I mean - duh - of course they will. The danger is not that global warming wipes out life on earth. It's that it sends human civilization back to the Stone Age or wipes it out completely (if Stone Age technology doesn't allow for survival). The idea that there's a technological solution assumes that we can manufacture and power such a thing without using even more fossils fuels to do so. I'm not convinced.