Sea level rise will happen no matter what we do. Even if we stopped all carbon dioxide emissions today, the seas would rise one meter by 2050 and three meters by 2100. This -- not drought, species extinction, or excessive heat waves -- will be the most catastrophic effect of global warming. And it won't simply redraw our coastlines -- agriculture, electrical and fiber optic systems, and shipping will be changed forever. As icebound regions melt, new...