It is called Greenland because they wanted people to go there to settle it and didn't want them to know what a frozen wasteland it was. Global warming is real and man-made (not caused by the sun). The Earth will eventually reach an equilibrium when the temperature increase ceases. We can expect more extreme weather, places getting wetter, places getting drier, even places getting colder with more snow than normal, but in the long run the planet will have a higher average temperature and the sea will rise.