Ключевые слова: abstract, background, be, black, blue, care, clouds, concept, day, design, earth, echo, ecology, element, environment, environmental, environmental conservation, geography, global, globe, graphic, green, hand, heart, heart shape, icon, idea, illustration, isolated, leaf, love emotion, map, nature, no people, planet, planet space, planet earth, plant, protection, save, sees it, shape, sign, sphere, star, symbol, toilet, world,