Chapter 17, Key Finding 3

Consequences of rising atmospheric CO2 are expected to include difficult-to-predict changes in the ecosystem services that terrestrial and oceanic systems provide to humans. For instance, ocean acidification resulting from rising CO2 has decreased the supply of larvae that sustains commercial shellfish production in the northwestern United States. In addition, CO2 fertilization (increases) plus warming (decreases) are changing terrestrial crop yields (high confidence, likely).