Ключевые слова: alternative, bio, biofuel, biology, biomass, burn, domestic, eco, ecological, energy, environment, environmentally, fire, firewood, flame, flaming, flowing, fossil, fuel, generation, granule, heap, heat, household, industry, mass, materials, measurement, natural, nature, no, pine, popular, power, recycling, renewable, sawdust, single, solid, source, stove, technology, timber, tree, unit, wallpaper, waste, woodchip, woodpile,