What is the term for a fuel produced by microbes as they consume sugar molecules from cellulose?

The term for a fuel produced by microbes as they consume sugar molecules from cellulose is bioethanol. This is a type of renewable energy that is produced through the fermentation of sugars, which are derived from plant materials like cellulose. Microorganisms, such as yeast, convert these sugars into ethanol, which can then be used as a fuel. This process reflects a sustainable method of bioenergy production as it utilizes organic waste and plant materials.

Biodiesel, although a renewable fuel, is primarily produced from lipid sources (oils and fats), not directly from cellulose. Biogas is generated through the anaerobic digestion of organic matter, including food waste and manure, and while it contains methane, it is different from the alcohol produced in bioethanol production. Petrochemical fuels, on the other hand, are derived from fossil fuels and are not produced by microbial action on cellulose.