The argument in favor of nuclear power at this point is pretty obvious: global warming is bad news, so a major power source that doesn't emit greenhouse gasses sounds good, right? An odd counter-argument has emerged from the anti-nuclear side: they claim nuclear power actually is a source of CO2 emissions. They say that if you look at the full life cycle of a nuclear power plant, so much work is done in mining, transport and decommissioning and so much concrete is used in its construction that nukes shouldn't be considered a low-emissions power source.
Fortunately, quite a few studies have been completed doing full-cycle analysis of the CO2 emissions for different power sources. From a report published in July 2011, a meta-study summarizing 21 such studies:
