Ключевые слова: air, alternative, background, biodegradable, biofuel, black, carpentry, chip, chips, construction, dry, dust, ecology, environment, fall, falling, filings, firewood, fly, flying, forest, heap, industrial, industry, levitate, levitation, lumber, material, mulch, natural, nobody, object, organic, pieces, pile, recycling, renewable, rough, saw, sawdust, shavings, sustainable, timber, tree, waste, wood, wooden, woodwork, yellow,