For all of the clowns supporting the thought that oceanic acidification is a problem (trolling blunder are you looking?) we have this piece of evidence. This further supports what gslack has allready presented but adds in the worst case scenario of quite simply adding all of the CO2 to the oceans that we are capable of. As you can see the effect would be negligable. Quadrant Online - Why scientists get it wrong "Similar to Darwin, the warming scientists added over 2.2°C to the beginning of the Prague record to change an inconvenient cooling trend into a supportive warming one. The corruption of the worlds temperature data sets by this sort of manipulation prompted the UK Met Office to announce on 25th February, 2010 that it is going to re-examine more than 150 years of global temperature records. The Met Office expects to take three years to complete the task, giving an indication of how corrupted the data set has become. To paraphrase Samuel Johnson, ocean acidification is the last refuge of the global warming scoundrel. To put the ocean acidification scare into context of actual science, the current pH of the oceans is 8.1 (less than 7.0 is acid). If humanity burns all the rocks we can economically burn, the basicity of the oceans may fall to a pH of 8.0. There is physical evidence that marine organisms can live very happily with very high levels of carbon dioxide in seawater. This is shown by the following figure, in which very healthy corals are growing above a carbon dioxide vent: Figure 74: Corals growing above a hydrothermal vent bubbling carbon dioxide, Dobu Island, Papua New Guinea Consideration of the geological record also shows that increased atmospheric carbon dioxide cannot cause detrimental ocean acidification. The reef-building organisms first evolved about 500 million years ago when atmospheric carbon dioxide levels were up to twenty times what they are currently."