Ключевые слова: alternative, biofuel, biology, burning, choice, co2, compressed, consumption, cylinder, eco, ecological, ecology, economy, efficiency, emission, energy, environmental, fire, fireplace, fuel, granule, green, group, hardwood, heap, heat, hot, macro, mass, material, nature, pattern, pellet, pellets, piece, pile, pine, power, pressed, recycling, renewable, renewable energy, roll, saving, stack, stove, texture, timber, warmth, wood pellets,