As the world’s population continues to grow, an ever-increasing number of people will live and work in urban areas. The UN’s 2017 World Population Report predicts that 2.5 billion inhabitants will be added to the world’s cities by 2050 – with almost 90% of this growth taking place in Asia and Africa.
By 2060, the global population will break the 10 billion mark, and a further billion will be added by the year 2100. Most people will live in cities, which will grow into mega-cities, where surface space will be at a premium, and underground space can help make a city more resilient and sustainable.