We hear a lot about the rising sea levels, but besides the obvious, what does that really mean? Global warming, melting glaciers and thermal expansion is causing oceans to rise, and at this point, we aren’t going to be able to stop it. That means cities like Washington D.C., Miami and New York City are going to start seeing some terrible floods. Addressing the problem could cost billions of dollars. The following infographic is a quick and dirty guide to rising sea levels and what our future holds (it isn’t good).