In Hostels that classify as Environmental|Hostel, socially responsible, ecologically sound and economically justifiable behaviour takes top priority. Special quality criteria, based on sustainable development, apply to these Hostels. The conservation of resources, healthy eating, the efficient use of energy, a program of leisure activities with an educational or ecological focus, an orientation towards the customer and the target group, regional integration, economic efficiency and a concept for quality development are among these criteria. Today, the Environmental Profile has become a quality mark for extracurricular environmental education, and more than 60,000 pupils per year participate in the program during school trips or summer camps.