Ключевые слова: background, bio, care, caution, circulation, city, collection, concept, conservation, decorative, design, destruction, dirty, earth, eco, ecological, ecology, element, emblem, energy, environment, garbage, global, graphic, icons, illustration, infographic, nature, nuclear, object, planet, plant, pollution, power, problem, protection, recycle, recycling, save, set, sign, smog, smoke, symbol, toxic, tree, warming, waste, world,