Since the development of the first large settlements over 5,000 years ago, people have been drawn to live and work in cities and towns. ... As future cities expand they will make use of all available space, including water, wherever possible. According to some futurists, environmentally friendly forms of transport, such as airships, will ferry people around by thhe year 2030.
――公立はこだて未来大学 前期日程 (2月25日実施)――2005年