Efforts are being made to reduce carbon dioxide emissions and combat global warming, yet a new problem is surfacing: Ocean acidification. The ocean has been absorbing man-made carbon dioxide. However, this is causing the ocean to turn acidic, and is negatively impacting coral, shelled creatures, and even the phytoplankton that are the foundation of marine food webs. Some have pointed out that this could disrupt various ecosystems. We'll take a look at this new aspect of global warming.