Question

define source of energy​

Answer 1

A source from which useful energy can be extracted or recovered either directly or by means of a conversion or transformation process (e.g. solid fuels, liquid fuels, solar energy, biomass, etc.) ... energy sources.

Answer 2

Visualization of the energy sources that are used in the United States, including solar, nuclear, hydro, wind, geothermal, natural gas, coal, biomass, and oil. Shows how much of each primary energy source is used, how much goes toward making electricity, and which sectors use each energy source.