Ключевые слова: abstract, background, bio, black, button, circle, clean, concept, design, earth, eco, ecology, element, energy, environment, environmental, flat, fresh, friendly, global, graphic, growth, health, healthy, icon, idea, illustration, isolated, label, leaf, life, logo, mark, modern, natural, nature, organic, plant, recyclable, recycle, recycling, resources, save, sign, stamp, symbol, tree, web, world,