Almost every way of making electricity today, except the emerging renewables and nuclear, emits CO2.

Judge as of 2010. True: energy data from around 2010 show that nearly all electricity generation sources other than renewables (wind, solar, hydro, geothermal and so on) and nuclear were fossil-fuel based and emitted CO2 at the point of generation. Mostly true: this holds with a minor caveat, for example that hydro was an established rather than 'emerging' renewable. Mostly false: a significant share of non-renewable, non-nuclear generation emitted no CO2. False: the evidence shows that major generation methods outside renewables and nuclear did not emit CO2.

Set before the research began.

1. E1 The Global Energy Outlook National Bureau of Economic Research (Working Paper 18967, Richard G. Newell and Stuart Iler) · April 2013

   “In 2010, the global electricity generation mix was 41 percent coal, 22 percent natural gas, 16 percent hydro, 13 percent nuclear, 5 percent oil, and 4 percent other renewables including wind, biomass/waste, geothermal, and solar (IEA 2012b).”

2. E2 Understanding CO2 Emissions from the Global Energy Sector (Knowledge Note Series, Energy Practice) World Bank · May 2014

   “Notes: Energy-related CO2 emissions refer to CO2 emissions from the energy sector at the point of combustion, as defined in the opening paragraph. Other includes emissions from industrial waste and nonrenewable municipal waste. CO2 emissions from renewable energy are insignificant and not presented here.”

3. E3 4.4.4 Electricity-supply sector mitigation potential and cost of GHG emission avoidance IPCC Fourth Assessment Report, Working Group III (Climate Change 2007) · 2007

   “By 2010 total power demand is 20,185 TWh with 13,306 TWh generation coming from fossil fuels (65.9% share of the total generation mix)”

4. E4 The Global Energy Outlook National Bureau of Economic Research (Working Paper 18967, Richard G. Newell and Stuart Iler) · April 2013

   “When biomass is combusted it releases emissions, but CO2 is also removed from the atmosphere during biomass”

E1 gives the 2010 global electricity mix as 41% coal, 22% natural gas, 16% hydro, 13% nuclear, 5% oil and 4% other renewables. Every source outside renewables and nuclear in that list is a fossil fuel. E2 treats energy-sector CO2 as emissions at the point of combustion and calls emissions from renewables insignificant, which supports the claim. There is a minor caveat: hydro, at 16% [E1], was an established source rather than an "emerging" renewable. E4 also notes that burning biomass releases emissions, though it adds that CO2 is also removed from the atmosphere during biomass (the quoted text breaks off at that point).