WATERVILLE, Maine, March 2 -- Colby College issued the following news: It is 2047. The northern states have outlawed fossil fuels. A civil war is erupting across the country. In the Southwest, the Colorado River has dried up, and militias are battling over water rights. New York City is submerged. Climate refugees are making their way by the millions to a floating city in the now-iceless seas of the Arctic Circle. Over the past decade, a tidal wave of climate fiction, or cli-fi, has swept int more PR