Ключевые слова: background, bio, blackboard, business, care, circle, clean, concept, conservation, cycle, design, earth, eco, ecological, ecology, element, energy, environment, environmental, garbage, global, graphic, green, help, icon, idea, illustration, isolated, life, natural, nature, object, planet, pollution, protection, recycle, recycling, reduce, responsibility, reuse, save, shape, sign, symbol, text, waste, white, word, world,