Proceedings of the National Academy of Sciences, Volume 122, Issue 23, June 2025. SignificancePrior to the Industrial Period, the highest levels of CO2and CH4over the last 800 ka occurred about 335 ka ago, at which time both gases rapidly increased before tailing back down over the next 1.3 ka. Here, we characterize these changes …
Observations from the Little Bunker
Last updated: August 18, 2025 04:13 PM
Atmospheric CO₂
425.4 ppm
+18.4
ppm/year
Atmospheric CH₄
1934.91 ppb
+9.11
ppb/year
Global Temperature
+1.48 °C
Peak: +1.73°C
World Population
8.1 billion
+67
million/year