The notion that the oceans will become more acidic as CO2 concentrations rise is well understood. By the year 2100, ocean acidity is predicted to be 7.8 pH, compared to 8.2 pH in 1900.Why is a pH of 7.8 significant?
At a pH of 7.8, the team noticed a marked change. Populations of coralline algae, which hold reefs together, suddenly crashed. Sea-urchins also disappeared.Not good.
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