Climate change due to industrial emissions of CO2 has been known and published in mainstream news articles since at least 110 years ago.[0][1] It's been known and discussed in public by professional scientists for over 140 years[2]. The great inaugural Nobel Prize winner, Arrhenius, wrote a paper on the topic in 1896[3] which cited Fourier's publication from 1827[4]. More generally, global greenhouse effect of CO2 has been known for at least 185 years[4], a decade earlier than the last founding father of the United States died.
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0: The Rodney and Otamatea Times (Aug 1912) https://www.livescience.com/63334-coal-affecting-climate-cen...
1: Popular Mechanics (Mar 1912): https://books.google.com/books?id=Tt4DAAAAMBAJ&pg=PA341&lpg=...
2: Nature (1882): https://www.nature.com/articles/027127c0
3: Journal of Science (Apr 1896) https://doi.org/10.1080/14786449608620846
4: M ́emoire sur les Temp ́eratures du Globe Terrestre et des Espaces Plan ́etaires, M ́emoires d l’Acad ́emie Royale des Sciences de l’Institute de France VII 570-604 (1827): https://geosci.uchicago.edu/~rtp1/papers/Fourier1827Trans.pd... (English Translation)