A study of the accumulation of carbon dioxide in the world’s oceans from 1765 to the present shows that as humanity pumps more CO2 into the atmosphere, the capacity of the world’s oceans to continue absorbing carbon appears to be decreasing.

Researchers from Columbia University and NASA estimate that since 2000, the proportion of fossil-fuel emissions absorbed by the oceans may have declined by as much as 10 percent. In effect, researchers say that industrial activity has been producing so much C02 since 1950 that the oceans are slowly becoming saturated with the gas.
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