Ключевые слова: background, bioenergy, biomass, brick, brown, chopped, chopped wood, closeup, construction, cost, cut, detail, ecological, ecology, energy, energy crisis, environment, fire, firewood, forest, forestry, fuel, heat, industry, log, lumber, lumberjack, material, natural, nature, old, pattern, saw, shoulder, stack, stacked, texture, timber, tree, trunk, uneven, value, wall, winter, wood, wood energy, woodcutter, wooden, woodpile,