I told Turambar that there are other numbers than those; I didn't have much time for searching, here is just one, which isn't that different -- the GEMIS numbers by the Öko-Institut:

Specific lifecycle CO2 emissions in g/kWh = t/GWh:

Subbituminous coal power plant: 1153
Bituminous coal power plant with imported coal: 949
Subbituminous coal heating plant: 729
Bituminous coal heating plant with imported coal: 622
Natural gas combined cycle power plant: 428
Natural gas combined cycle heating plant: 148
Nuclear power plant (uranium imported only from South Africa), without spent fuel storage: 126
Multicristalline solar cell (with current energy supply for manufacturing): 101
Natural gas block heating power plant: 49
Hydroelectric power: 40
Nuclear power plant (present resource use in Germany), without spent fuel storage: 32
Solar electricity import from Spain: 27
On-shore wind: 24
Off-shore wind: 23
Biogas block heating power plant: -409[Typo?]

_{*Lunatic*, n.
One whose delusions are out of fashion.}