Jan Chwedeńczuk
-
University Professor
Faculty of Physics
Warsaw University
CO2 level for December
427.49 ppm
425.40 ppm
CH4 level for September
1940.59 ppb
1934.39 ppb
Earth System Research Laboratory
Global Monitoring Division (NOAA)
retrieved on January 20, 2026 from::
NOAA National Centers for Environmental Information
State of the Climate: Global Climate Report for December 2025
published online January 2026
Contact
- jan.chwedenczuk()fuw.edu.pl
- +48 22 55 32 808
room: 4.08 - Address:
ul. Pasteura 5
PL-02-093, Warsaw
Poland