We have one generation to save our cities, global engineering firm warns

Combined challenge of climate change and population growth puts premium on rapid urbanisation 'in a way that's not going to kill us', says head of Arup

Cities around the world have only one generation to meet the twin challenges of climate change and a rapidly growing urban population, the head of a global engineering firm has warned.

Gregory Hodkinson, chairman of the Arup group, said that with more than half the world's population already living in cities, and the proportion set to rise to 70% by 2050, city leaders need to take urgent action.