Ключевые слова: banff, canada, canadian, dieback, driftwood, drive, environment, float, forestal, forestry, lake, lakeshore, log, lumber, moraine, mountains, national, nature, outdoors, park, pile, purity, raft, river, riverbank, rockies, rocky, rotting, silviculture, snag, stockpile, tree, trunk, waldsterben, water, wood,