P.S. nuclear power plants release no CO2.
That's only true about the electrical production ... building the plant is exceptionally carbon-intensive ... we can amortize this output over the life of the plant, so we need to build these things to last ... hydro has the same problem but last far far longer than the typical nuclear plant ...
Limestone has to be cooked at 1,800ºC for several hours to make cement ... and then the cement itself releases carbon dioxide as it cures ... meh ... still a small price to pay ... if we want a secure energy future, we need to get busy pouring concrete ...