Ключевые слова: abstract, art, background, blue, business, care, circle, clean, clipart, color, concept, design, drop, earth, eco, ecology, element, energy, environment, environmental, global, globe, graphic, green, growth, image, isolated, leaf, light, map, natural, nature, organic, planet, plant, power, protect, protection, recycling, shape, sign, symbol, technology, tree, water, white, world,