The transition to sustainable, renewable energy is well underway and biogas is a good example of this. Biogas is a gas that is created as a result of the fermentation of organic material, such as manure, sewage sludge or dumped household waste. The biogas mainly consists of methane (CH4) and carbon dioxide (CO2), but also components such as oxygen (O2), hydrogen gas (H2) and hydrogen sulphide (H2S).