Charles Keeling 1958-2005 Mauna Loa CO2 record: 315 ppm 1958 -> 422 ppm 2024; +2.5 ppm/yr modern accumulation; ~50% airborne fraction.
Charles Keeling 1958-2005 Mauna Loa CO2 record: 315 ppm 1958 -> 422 ppm 2024; +2.5 ppm/yr modern accumulation; ~50% airborne fraction.