alternative fuel

noun

1. a vehicular fuel that is not entirely derived from petroleum, as natural gas, hydrogen, or an alcohol mixture:

   the environmental benefits of alternative fuels.

Word History and Origins

Origin of alternative fuel¹

First recorded in 1905–10

Example Sentences

He means alternative fuels like so-called renewable natural gas and hydrogen energy.

From Voice of San Diego

Puthucheary and his colleagues are conducting a small study to test whether ketones—an alternative fuel source derived from the body’s breakdown of fat—or an amino acid metabolite called hydroxy methylbutyrate might work better.

From Popular-Science

Some are touting hydrogen as a potentially emissions-free alternative fuel that could fill the gap.

From Singularity Hub 

In the hunt for alternative fuels, biomass burning has become a popular way to swap out fossil fuels.

From Popular-Science

But, there are still some issues out there for which there are not really any plausible solutions right now—namely, alternative fuel options for the industrial sector.

From Popular-Science

In the late 1980s it took off as the environmentally correct alternative fuel, but that's been disproved as well.

From The Daily Beast

We took it on with green building, public transit, alternative fuel and power, recycling, and other issues.

From The Daily Beast