Ключевые слова: adult, autumn, bearded, beautiful, biology lesson, camping, caucasian, childhood, children, class, close up, earth, eco, ecological, education, environment, excursion, fall, generation x, generation y, generation z, global, interaction, interesting, kid, learn, leaves, lesson, lifestyle, male, man, natural, nature, navigation, outdoors, planet, preschooler, school, scout, smart, study, teacher, tourism, tourist, trees, trip, tutor, worldwide,