First Paper to Link CO2 and Global Warming (1856)
I’ve always found climate scepticism strange, because of its emphasis on refusing to accept the connection between rising temperatures and CO2. This really seems to be the least defensible position which could be chosen. The “scepticism” is disputing really basic science which has been well understood for a long time, and it’s in that sense that calling it denial is accurate. It would be much more defensible to accept a lower level of climate sensitivity, but dispute the mechanisms which cause higher sensitivity, or possible future positive feedback effects.