Ключевые слова: abstract, arrow, art, bio, blue, business, cardboard, chalk, character, circle, clean, concept, countryside, cycle, day, drawing, earth, eco, ecological, ecology, environment, environmental, fall, field, grass, green, icon, land, leaf, marker, meadow, natural, nature, organic, plant, pollution, protection, publicgreen, recovery, recycle, recycling, reuse, rural, shape, sign, symbol, trash, waste, wastepaper,