>>41361202>>413613461.The ocean is a giant fucking buffer (it absorbs acids and bases to stop massive pH swings that would kill all life in it).
2.Carbon found in oil and coal has be non bio-available for fucking millions of years, all of humanity using it at the same time means more carbon is introduced then the carbon cycle can handle (this is exacerbated by the clearing of trees, who are the primary means the CO2 is fixed [removed from the atmosphere] and made bio-avilable for animals to use)
3. Introducing massive amounts of CO2 into the atmosphere in such a short time has a twofold effect for our purposes 1. It absorbs heat from the sun that would have otherwise been lost to space which raises the temperature on earth and 2. It pushes the CO2/H2O balance to the right (this is year 7 science), being CO2 + H2O <-> H2CO3. This causes Carbonic acid to become more available in the ocean pushing the pH down past the point it can effectively buffer.
Tl:DR you're fucking retarded if you can't understand this or brainwashed by your oligarchical masters.