Ключевые слова: 30s, 40s, 60s, 70s, activity, altruism, altruistic, care, caucasian, charity, cheerful, collecting, community, concern, countryside, elderly, environment, female, happy, leisure, lifestyle, male, man, mature adult, mid adult, nature, outdoors, outreach, participate, participating, participation, picking up, recreation, rubbish, selfless, senior, smiling, social, summer, summertime, sunny, sunshine, trash, volunteer, volunteering, volunteerism, welfare, woman,