Renewable energy, Sustainable Source as Replacement fuel for Natural Resources Preservation

More than 50000 T/Year charcoal from tree wood is used in Iran and caused deforestation and natural resources damage. Also charcoal volatile matters are as pollutant for environment. Wood from natural resources is the main sources for fuel prepared for cooking, heat and etc. In the other hand, as the third largest energy resource after coal and oil, biomass used to catch the highest demand for energy till mid-19th century. Renewability and lowcost  production process of biomass fuels grabbed high demands for domestic cooking, industrial process heating, electrical power generation etc. Also Biofuel as gaseous, liquid or solid fuel have energy from bio resources or biomass. The availability and wide diversity of biomass resources have made them an attractive and promising source of energy. The current essay introduces two types of biofuel such as solid biofuel and biogas as replaced sources for energy in natural resources.