Mass Extinctions and Their Relationship With Atmospheric Carbon Dioxide Concentration: Implications for Earth's FutureIndustrialization has raised the concentration of carbon dioxide (CO2) in Earth's atmosphere by half since 1770, posing a risk from ocean acidification to global biodiversity, including phytoplankton that synthesize approximately (∼) 50% of planetary oxygen. This risk is estimated here from the fossil record and implications for our energy and economic future are explored.
