Biomass is a renewable energy resource (RER) produced from a biological source - plant products, for example, trees, bushes, grain, reeds, algae, animal products, for example, fats, waste. Bioenergy as a renewable source of energy covers 10-15% of the primary energy demand in the world. In the developing countries the proportion of using biomass is larger. The book consists of of several paragraphs: Kinds of biomass. Classification on bioenergy resources. Criteria for using bioenergy resources; Evaluation : Evaluation of energy properties. Fuel properties. Combustion heat. Fuel humidity. Fuel ashiness. Volatile substances. Evaluation : Evaluation methods. Biofuels life cycle analysis. Why LCA. What is possible to do and to reach with LCA. Applications of LCA : general overview. LCA methodology. Computer models for LCA; Case studies. LCA for biogas from algae. Biodiesel LCA; Description of biomass resource types. Energy-generating plants. Root crops. Tuberous plants. Energy grasses. Stalk grass. Oleaginous plants. Herbage plants. Other biomass plants. Osier. Characteristics of diverse forest biomass. Biomass resources available in the main cutting aress. Types of biomass available in cleaning cuttings. Other forest biomass resources. Forest biofuel storage and supplies to consumers. Effect of forest biofuel preparation on environment. Short rotation power generating wood plantations; Agricultural biomass byproducts and organic waste. Concepts of agricultural biomass byproducts and waste. Legislation regulating processing byproducts and waste into energy. Aggregative state of biomass and usage possibilities. Assessment of power generating potential of agricultural byproducts. Manure resources. Sewage sludge resources. Food processing waste biomass recources. Biodegradable waste recources. Slaughterhouse waste recources. Collection and pre-treatment technology of agricultural byproducts. Collection, transportation and pre-treatment of straw and overgrow. Collection and transportation of manure. Sorting and transportation of food waste. Impact of agricultural byproducts abd waste use in power industry on environment. Impact on greenhouse gas emissions. Returning and digging into soil biomass processing residues used in pover industry; Biogas production. Potential of biogas in Europe and the world. Anaerobic fermentation. Substrates used in anaerobic fermentation. Biochemical process. Anaerobic fermentation parametrs. Main usage of biogas. Deposit area gas. Biogas from agricultural waste and crops. Biogas from sewage sludge. Biogas production from algae. First generation bioethanol production from food. Second generation bioethanol production from wood products. Third generation bioethanol production from algae. Biodiesel production. Biodiesel production from food plants. Biodiesel production from algae products. Energy production from biomass : Production of thermal energy in boiler houses. Unified biofuel boiler house scheme. Characteristics of energy efficiency in fuel combustions processes. Excess consumption of fuel; Furnace boilers and their operation features. Furnace design. Essentials of combustion technologies. Energy production from biomass : power generation. Biomass CHP plants. Classification of biomass CHP plants. Biomass CHP plants with capacity above 100 MWe. CHP plants with capacity from 20-100 MWe. CHP plants with 20 MWe capacity. CHP plants with biomass gasification.