Preindustrial
CO2 278 ppm
VIDEO Scripps animation record of atmospheric CO2, from 800,000 year agoto present day 2019
Dec.2023
Atmospheric CO2: 422.48 ppm
NOAA
Unprecedented rate of atmospheric CO2 increase
Multiple lines of evidence show that the rate at which CO2 has increased in the atmosphere during 1900–2019 is at least 10 times faster than at any other time during the last 800,000 years, and 4–5 times faster than during the last 56 million years
(IPCC AR6, WG1, 5-676)
IPCC AR6 record from 800,000 years ago
State of Our Climate
Emissions