Does nuclear emit more CO2 than renewables?
No. When generating electricity, nuclear power emits no CO2. When construction, mining and decommissioning of the various technologies are accounted for, nuclear emits far less CO2 than any other electricity generation technology, or mix of technologies, that can meet our demand for electricity. If we ignore the emissions from the back-up generators, wind power emits roughly the same as nuclear generators. When we include them, wind power emits about the same as efficient gas generation.