Ключевые слова: abstract, art, background, book, business, concept, cover, creative, design, dictionary, document, ecology, education, element, empty, environment, field, forest, graphic, grass, green, growth, icon, idea, imagination, information, knowledge, landscape, leaf, learning, library, life, literature, natural, nature, object, open, page, paper, plant, reading, school, sheet, sign, space, study, sun, symbol, textbook, tree,