Biomass does not add carbon dioxide to the atmosphere as it absorbs the same amount of carbon in growing as it releases when consumed as a fuel. Its advantage is that it can be used to generate electricity with the same equipment or power plants that are now burning fossil fuels.
Biomass is an important source of energy and the most important fuel worldwide after coal, oil and natural gas. Traditional use of biomass is more than its use in modern application. In the developed world biomass is again becoming important for applications such as combined heat and power generation. In addition, biomass energy is gaining significance as a source of clean heat for domestic heating and community heating applications.
Biogas is a product of fermentation ( anaerobic process ) of organic material. Organic means substances from plants or animal origin and with a high content of carbon. The main goal of the fermentation is to produce biogas as a energy source of renewable energy. The main components are methane (CH4, round about 60 %) and carbon dioxide ( 30-40 %).