But within a couple of years, the rapid construction of non-carbon wind and solar systems made up for San Onofre's lost electricity, and natural gas use —
excluding excess natural gas burned to make up for lost
hydroelectricity due to the drought — dropped again.
The U.S. Energy Information Administration includes the following in U.S. primary energy production: coal production, waste coal supplied, and coal refuse recovery; crude oil and lease condensate production; natural gas plant liquids production; dry natural gas
excluding supplemental gaseous fuels production; nuclear electricity net generation (converted to Btu using the nuclear plant heat rates); conventional
hydroelectricity net generation (converted to Btu using the fossil - fuels plant heat rates); geothermal electricity net generation (converted to Btu using the fossil - fuels plant heat rates), and geothermal heat pump energy and geothermal direct use energy; solar thermal and photovoltaic electricity net generation (converted to Btu using the fossil - fuels plant heat rates), and solar thermal direct use energy; wind electricity net generation (converted to Btu using the fossil - fuels plant heat rates); wood and wood - derived fuels consumption; biomass waste consumption; and biofuels feedstock.