Ключевые слова: alternative, background, bio, biofuel, biological, biomass, brown, burn, closeup, compressed, domestic, eco, ecologic, ecological, ecology, economy, energy, environment, fire, fireplace, firewood, fuel, green, heap, heat, mass, material, money, natural, nature, organic, pellet, pellets, pile, pine, power, pressed, recycling, renewable, roll, sawdust, season, solid, stove, timber, top, view, winter, wood, wooden,