[verdverm]

https://www.google.com/search?q=global+cooling+in+the+1970s

click on image results, it was a Time cover at one point

[quantified]

Yeah, just not long term actual traction. The impact of CO2 emissions was recognized in the 1800s and has been of increasing concern since then. It was treated as a good tbing by people who feared ice ages (and read a lot of Time).