In this situation,it does not mean that when we exhale then give out carbon dioxide and its pollute the ocean.The ocean will be acidified due to bilion tons of carbon dioxide.The main factors are forests been cutted down and indusrial revolution.The air and water offen exchange gases,therefore,pollution emitted into the atmosphere end up into the ocean.
As low pH value,a lot of aquatic animal eventually dead because of they can not live in the acidic sea water.
this picture show the carbon dioxide bubbles from the seafloor.If carbon dioxide continuely emission,many of the seafloor will be like this.http://www.ouramazingplanet.com/1830-seafloor-volcanic-vents-ocean-acifidication.html
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