A renewable fuel gas produced by breaking down organic waste like food scraps and manure in an oxygen-free environment, which can be burned for energy.
From bio- (life) + gas (from Flemish/Dutch chaos, but popularized in modern chemistry). The term emerged in the 1970s-80s as renewable energy became important.
Biogas turns your garbage into electricity—cows' manure at farms is literally being converted into power right now because methane from decomposition is a fuel, making waste profitable!
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