Grand Challenges in Sustainable Cities and Health

The size of global urban population has increased exponentially since the advent of the industrial revolution, with urban centers attracting large numbers of workers and families looking for opportunities for employment, education and better quality of life. The growth of large urban centers initially in Europe and North America was followed by even larger megacities in Latin America, Asia and Africa. Currently, more than half of the world's population lives in cities, with this figure projected to reach two-thirds of the world's population by 2050.