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bio gas
renewable fuel made from the breakdown of organic matter by microbes in an oxygen free area
bio fuels
renewable energy source made from biomass made into liquid, solid, or gas fuels
anaerobic digestion
natural process where microorganisms break down organic materials in an oxygen absent tank
anaerobic digestion outputs (bio gas)
electricity, heat, vehicle fuel, renewable natural gas,
anaerobic digestion outputs (digestate)
animal bedding, organic fertilizer, building material, crop irrigation,