For it is hard to understand by now (but you also can find newspaper article about the carbon in the air more than a century), the issue remains the same : most people cannot conceive man made could do so big. It is out of their horizon.

Yes, you're right. The first paper to correlate the CO2 increase to temperature rise (a good thing for Scandinavia, according him) was "On the Influence of Carbonic Acid in the Air upon the Temperature of the Ground", by Svante Arrhenius, in Philosophical Magazine and Journal of Science (1896).