Proceedings of the National Academy of Sciences, Volume 122, Issue 44, November 2025. SignificanceAmmonia (NH3) emissions from human activities can significantly influence aerosol processes in the upper troposphere and lower stratosphere (UTLS). Using an Earth system model, we show that anthropogenic NH3strongly enhances new particle …
Observations from the Little Bunker
Last updated: November 30, 2025 04:25 AM
Atmospheric CO₂
426.8 ppm
+18.1
ppm/year
Atmospheric CH₄
1927.61 ppb
+2.73
ppb/year
Global Temperature
+1.48 °C
Peak: +1.73°C
World Population
8.1 billion
+67
million/year