Since the 1970s, our oceans have absorbed 90% of the excess heat produced by CO2 emissions. Warming ocean water expands and together with land ice melting, sea levels rise. Oceans absorb carbon dioxide, which is taken up by marine plankton, but warmer oceans contain less plankton. Rising sea levels will flood islands, and higher tidal waves will surge inland. Warmer seas increase the frequency and intensity of tropical cyclones, Our world is sure to look very different in the future.