Proceedings of the National Academy of Sciences, Volume 122, Issue 33, August 2025. SignificancePaleoclimate is closely linked to atmosphericpCO2. Quantifying ancient CO2levels, however, is challenging. Air-breathing vertebrates respire air O2and incorporate its isotope signature via body water into their hard tissues. Fossil tooth …
Observations from the Little Bunker
Last updated: October 16, 2025 02:57 AM
Atmospheric COâ‚‚
424.4 ppm
+18.2
ppm/year
Atmospheric CHâ‚„
1933.54 ppb
+12.29
ppb/year
Global Temperature
+1.48 °C
Peak: +1.73°C
World Population
8.1 billion
+67
million/year