Ключевые слова: abstract, agriculture, algae, beautiful, biology, covered, dirt, dirty, ecology, ecosystem, environment, field, floating, foliage, grass, green, growth, lake, leaf, motion picture, natural, nature, nice, organic, outdoors, plant, polluted, pollution, river, sky, spring, stagnant, stagnate, summer, sunlight, surface, texture, tree, video, view, water,