Yes, but. Think of all the land in Siberia and Canada that would be opened up for habitation because of the warmer weather. And the warmer weather would allow for more evaporation of water from the oceans, so that there wouldn't be as mush coastal loss of land as one might think. And the humid air would deposit much of its moisture on the Sahara and other Deserts, turning them into lush gardens, opening them up for habitation, as well.

We need global warming, just to give us more land for cultivation to support our growing populations.