'fossil-fueled' originates from the combination of 'fossil' and 'fuel,' where 'fossil' refers to ancient organic remains and 'fuel' refers to a material used to produce energy.

The term 'fossil-fueled' evolved from the need to describe energy sources derived from fossil fuels, which became prominent during the Industrial Revolution.

Initially, it referred to any energy source derived from ancient organic matter, but now it specifically denotes energy sources like coal, oil, and natural gas.