Global warming... Superman's Fortress of Solitude is located in the Arctic, in all that ice. But if global warming melts all that ice... What's he going to do then? A Canadian Fortress of Solitude just isn't going to be quite the same. Canadian Mounties, "Eh? What's with all these crystals? You got yourself a permit for those, do ya?" Superman, "Go away Mounties." Mounties, "Eh."