“In parts of Siberia the southern boundary of permanently frozen ground is receding poleward several dozen yards per annum.”
In the 1820s, Joseph Fourier realised that heat-trapping might occur. Then Svante Arrhenius reminded us in 1896 that both water vapour and carbon dioxide were ‘greenhouse gases’ (escaping that bad analogy is hard) and so water and carbon dioxide would play a role in making the planet get warmer. He also considered changes that might be happening, and consulted Arvid Högbom, who just happened to know all about carbon dioxide sources and sinks.
The problem is that so long as people can get away with saying "global warming", we are once again stuck with a bad analogy, just as the early 1960s saw us hung up on “continental drift”.