The Mauna Loa CO2 data is still up.[1] Trump tried to kill off the CO2 measuring, but that doesn't seem to have happened. The Mauna Loa data goes back to 1958, measured at the same point, far from any CO2 sources. 315ppm in 1958, 441ppm today, and almost a noise free curve with mild seasonal variations. Clearest trend in global warming.

[1] https://gml.noaa.gov/webdata/ccgg/trends/co2/co2_mm_mlo.txt

[2] https://www.cnn.com/2025/07/01/climate/trump-cuts-mauna-loa-...