Ключевые слова: alder tree, alnus, annual ring, background, bark, beech, biomass, brown, cut, death, deforestation, detail, energy, environment, fire, firewood, forest, forestry, fuel, glutinose, hardwood, industry, log, logging, lumber, material, natural, nature, root, saw dust, sawdust, stack, stacked, stump, texture, timber, tree, trunk, wood, wooden, woodpile,