the.com/biofuel

means Fuel made from recently living plants or organic waste (like corn, algae, or used cooking oil), rather than from fossilized matter dug up from millions of years ago.

from A straightforward 20th-century compound: the Greek-derived prefix 'bio-' (life, as in biology) bolted onto 'fuel' (from Old French 'foaille,' rooted in Latin 'focus,' meaning hearth or fireplace). The word itself only became common currency in the late 1900s, as the energy crisis and climate concerns pushed scientists and policymakers to find a label for fuel grown rather than mined — the 'bio-' doing all the work of distinguishing it from its ancient, fossilized cousins.