It seems like we're discovering a bunch of technologies that involve removing carbon dioxide from the atmosphere now (and even using it as a resource). That isn't the only problem gas, but I'm optimistic that we will solve the "greenhouse effect" problem through this sort of climate engineering before the real disaster of rising sea levels gets too far. In a century people will probably be freaked out by a host of issues we've barely even thought of today (things like the Kessler syndrome that are not so top-of-the-mind).