Ключевые слова: alternative, bio, biofuel, biomass, birch, block, brick, briquet, briquette, brown, burn, burnable, burning, cheap, compressed, conservation, dry, eco, economy, fire, fireplace, firewood, flame, fuel, furnace, heap, heat, home, house, indoor, kindling, lumber, natural, night bricks, nobody, oak, oven, pellets, pile, power, pressed, recycling, renewable, sawdust, stack, stove, timber, wood, wooden,