Clean coal? No such thing!

From John  Pratt

The "National Electricity Market" (NEM) is the joint electricity grid of the eastern states in Australia.

Note that the emissions from gas represent direct emissions of CO2, not the hidden emissions (leaks from pipelines, etc) of methane.  Methane is about 100 times more warming than CO2 over 20 years.  All methane decays into CO2 in about 10 years, so if there is no increase in methane leaks then after those 10 years, there is no additional impact on global warming.  Unfortunately methane in the atmosphere is rising:

(Source)