In the very long term, how can you dispute the benefit of human expansion in Antarctica? Humans have thrived in times when there was little glaciation and suffered in times of increased glaciation. The only benefit of glaciers is that we're accustomed to the climate they promote. I have no doubt that mankind could adjust to and thrive in a world without glaciers. It's ridiculous how afraid humans are to engineer their planet compared to a century ago.
I think Antarctica is 1/2 the size of North America. You have a house of 400m^2, I present you with a house of 100m^2 and invite you to consider the upside.
It's not a trade though, especially with most/all of Canada and Alaska becoming livable. Not to mention unrelated benefits. like year-round arctic navigation and safer navigation around Antarctica
