How does the ocean become acidic?

dive in
bg position
el up again
bg color
h2o appear
co2 and h2o react
h2co3 emerge
h2co3 split
hco31 split
center co32
deformed shells
CO2 Dissolved
carbon dioxide
H2O Water
H2CO3 Carbonic acid
HCO31- Bicarbonate ions
H+ Hydrogen ions
H+ Hydrogen ions
CO32- Carbonate ions
Deformed shells