Biogas is produced in a natural process where organic biomass decompose. When biomass is processed in a biogas plant, the biogas plant will produce a renewable gas that will replace fossil-based energy and reduce CO2 emissions. In these systems, the conversion of organic matter into carbon dioxide and methane gas is carried out under the influence of microbiological flora in an oxygen-free environment. Since the extraction of biogas is mainly based on organic-inorganic separation, its main inputs are vegetable waste and animal fertilizers. The conversion of animal fertilizers to biogas is done by fermentation process and can be used in many fields such as energy production, heat systems, transportation. The outputs of these systems are not only gas or energy, but also very useful products such as organic fertilizers, nitrogenous water, are provided with correct plant installations. Today, biogas production is in various sizes; It can be planned to cover the heating and kitchen expenses of a single house and to meet the electricity, heating and transportation needs of a city with large facilities. It is possible to establish and operate these systems with the right investment and correct engineering studies.

Biogas plants will also contribute to both meeting the carbon budgets and reducing the pressure on the planet's resources, such as fossil fuels, nitrogen and phosphorus