This ones new to me; perhaps you too ...
CO2 emissions turn oceans to acid
Tim Radford, science editor
Friday July 1, 2005
“Soaring carbon dioxide levels have begun to make the oceans more acidic, Britain's most senior scientists warn. Exhausts from fossil fuels have already increased the acidity to a level that cannot be reversed in a human lifetime. Only swift and drastic cuts in emissions could begin to stabilise the oceans by 2100.”
Continued @ http://www.guardian.co.uk/guardianpolitics/story/0,,1518661,00.html
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.... Carbolic acid ( CO2 + water +little else ), if I remember right ...