Ключевые слова: abstract, africa, america, background, ball, blue, business, circle, concept, continent, design, earth, ecology, element, environment, europe, geography, geometric, global, globe, graphic, heat, icon, illustration, internet, isolated, land, map, modern, nature, network, ocean, planet, round, sign, simple, space, sphere, summer, sun, sunlight, sunshine, symbol, technology, travel, weather, web, world, yellow,