Atmospheric CO2:
1960 - 1969 +8.5 ppm
1970 - 1979 +12.8 ppm
1980 - 1989 +16.1 ppm
1990 - 1999 +15.0 ppm
2000 - 2009 +19.7 ppm
2010 - 2019 +24.0 ppm
2020-2024 +10.67 ppm
linear extrapolation
2020-2029 +26.7ppm