Ключевые слова: background, ball, blue, business, care, concept, continent, crystal, day, earth, echo, ecology, energy, environment, environmental, global, globe, green, hand, happy, hold, holding company, human, map, natural, nature, nature vegetation, network, one, outdoors, ozone layer, people, person, planet, pollution, protect, protection, recycle, reforestation, save, science, sharing, social, sphere, symbol, technology, trees, unrecognizable, world,