Ключевые слова: background, beautiful, blackboard, board, business, campaign, chalkboard, climate, concept, day, earth, earth day, environment, forest, frame, global, globe, grass, green, hand, holding, hope, illustration, land, landscape, leaf, letter, lifestyle, message, natural, nature, object, outdoor, park, people, person, planet, plant, portrait, protect, protection, quote, recycling, save, showing, sign, spelling, summer, text, travel, tree, trunk, wood, wooden, word, world,