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by acidburnNSA 1972 days ago
2014 data from an IPCC meta-analysis here roughly supports this [1]. 800 gCO2-eq/kWh for coal, 490 for gas, 48 for solar, 12 for nuclear, 11 for wind.

To be clear, any non-carbon energy source can decarbonize almost to zero assuming all the lifecycle activities are converted to the non-carbon energy as well. One exception might be hydro with it's potential biogenic methane emissions.

[1] https://www.ipcc.ch/site/assets/uploads/2018/02/ipcc_wg3_ar5...