Ключевые слова: academic, background, blue, care, career, class, clean, college, color, colorful, composition, concept, conscious, conservation, copy, cycle, development, diary, different, earth, eco, ecology, education, elementary, english, environment, environmental, flat, frame, garbage, global, information, job, journal, knowledge, lay, learn, learning, light, many, material, nobody, notebooks, object, occupation, organic, paper, plastic, pollution, profession, protection, recycle, recycling, reduction, reuse, save, school, space, student, sustainable, teacher, text, top, university, various, view, waste, work, world,