Ключевые слова: algae, background, beauty in nature, blue, color image, colored background, design, environment, environmental conservation, flat physical description, floating on water, flotation tank, flowing, flowing water, green algae, green color, horizontal, lagoon, lake, lake bed, motion, natural condition, nature, organic, outdoor, pattern, plant, rapids river, reflection, river, riverbed, seaweed, shallow, sunlight, textured, textured effect, toilet, uncultivated, water surface,