Ключевые слова: abstract, background, blue, box, business, care, clean, concept, day, design, development, drop, eco, ecology, element, energy, environment, environmental, food, fresh, graphic, green, health, icon, illustration, isolated, leaf, logo, natural, nature, organic, people, plant, product, purity, quality, recycle, recycling, save, set, sign, sun, symbol, tree, trees, water, wood,