I’m not sure exactly why, but I’m reading The Limits to Growth by Meadows et al. (1972). The book created debate at the time, and is still a sort of reference for arguments against infinite growth if I got it rigth. Anyway, on p. 86 (paperback, 1st printing), I read the following paragraph:
If man’s energy needs are someday supplied by nuclear power instead of fossil fuels, [the] increase in atmospheric CO_2 will eventually cease, one hopes before it has had any measureable ecological or climatological effect.
That was 1972. Innocent days.