Ключевые слова: activity, asian, boy, chinese, clean, education, environment, environmental protection, female, friends, garbage, girl, good people, grass, group, happy, help, japan, kindness, korean, life, lifestyle, man, nature, outdoor, park, people, person, picnic, plastic bag, polluted, saving, smiling, teenager, thai, together, trash, vietnamese, volunteers, woman, work, young, youth,