The cleanest city is Zurich, the survey said, although the tidy Swiss city also finished equal second behind EU hub Brussels as the most boring place.

• 苏黎世被评为最干净城市，不过这个瑞士城市同时与其他城市并列第二大“最无聊城市”，仅次于欧盟总部布鲁塞尔。