Ключевые слова: alternative, background, bio, biological, biomass, branch, brown, burn, compressed, consumption, cylinder, eco, ecologic, ecological, ecology, economy, energy, environment, environmental, fuel, green, heap, heat, litter, mass, material, natural, nature, needle, pellet, pile, pine, power, pressed, recycling, renewable, roll, saving, season, stack, stove, texture, timber, winter, wood, wooden,