text: Changing Waters: Patrick Moore, one of the founders of Greenpeace, who has since left, gives four succinct reasons why we should not fear that enhanced CO2 will cause the so-called ocean acidification and it is not a threat to creatures in the oceans: 1) higher concentrations of CO2 in the past; 2) buffering from elements such as calcium and magnesium; 3) biology of mollusks allow them to survive in freshwater that is quite acidic and 4) adding CO2 to saltwater aquariums promotes plant and coral growth. See links under Acidic Waters.