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In Stockholm, piano stairs have been installed in the Odenplan subway station recently, to take the place of regular stairs. Why, you may wonder, does this happen? Actually, it merely aims to encourage people to take the stairs instead of the escalator. As great fun is added to walking, 66% more people than usual, claimed the government, preferred stairs to escalator after the piano stairs were installed. What a brilliant idea and a great way to promote healthy lifestyle!