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The process of fermentation can make fuels. This involves the use of bacteria

or yeast to break down sugars by anaerobic respiration.



Ethanol can be made when yeast is used to break down glucose.This produces

Glucose à ethanol + carbon dioxide + Energy

The glucose is derived form sugar cane or maize starch and the ethanol produced is

distilled to separate it from the yeast.



Biogas is a fuel, which consists of methane and carbon dioxideon scale of

approximately 70:30

Biogas is produced from animal and plant waste which is placed in a generator

with microorganisms, which are kept at a constant temperature to produce biogas.

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