Ключевые слова: adult, attentive, bearded, cheerful, cheerful mood, classroom, concentrated, earth protection, eco lesson, ecological issues, ecology lesson, ecoproject, educating program, enthusiastic, eyeglasses, game, igen, indoors, intelligent, interested, involved, learn, man, observe, positive, premises, profession, room, school, smart, smiling, teacher, tutor, wind power plants,