Well, there is less of dust, and a little bit less of CO2
But a lot more of CH4. Which seems to be the national policy, see quote.
"The U.S. Energy Information Administration expects 8 GW of gas generation capacity additions in 2016, reflecting the recent trend of utilities shifting to gas fired generation. From 2000 through 2015, the U.S. added 284.36 GW of gas capacity — nearly 70% of the 410.28 GW of total utility-scale capacity added to the grid."
The climate effect is negative in the coming decades from such substitions within the FF arena, due to the very high GWP of methane, the positive effect on GW comes only later.