Only about 21% of US electricity comes from coal right now, and the number is falling over time.
Efficient natural gas plants can actually do pretty well, about the same as the 372g/kWh grid average. Almost no oil (or petro coke, etc) is burned for electricity. I think less than a tenth of the amount of electricity from solar (solar is currently somewhere around 5% to about 4.2%, depending on how you count "now", i.e. annualized amount based on the last month of data in April with seasonal effects taken out... or the more conservative 12 months rolling average).
Efficient natural gas plants can actually do pretty well, about the same as the 372g/kWh grid average. Almost no oil (or petro coke, etc) is burned for electricity. I think less than a tenth of the amount of electricity from solar (solar is currently somewhere around 5% to about 4.2%, depending on how you count "now", i.e. annualized amount based on the last month of data in April with seasonal effects taken out... or the more conservative 12 months rolling average).