The switch to high efficiency combustion turbine / combined cycle is what has driven U.S. CO2 emissions to low levels. Natural gas emits half the CO2 of coal and combined cycle plants have almost double the efficiency of coal, so they put out 1/4 the CO2 of coal.
I actually think it is a,dreadful mistake to use gas to make electricity. Save gas for home and commercial heating and for feedstock to petrochemical processes. It is way too valuable to make electricity with; generate power with nukes and coal.
yes or nucs