Demographic pressures, climate change and the promise for economic opportunity are driving increased urbanization in many parts of the world.
In 2000, 30% of Africans and 35% of Asians were city dwellers. By 2014, that proportion had increased to 40% of Africans and 47% of Asians and is expected to reach 62% and 65% by 2050 according to UN Habitat (see diagram below). Of the 2.5 billion people to be added to the urban population in the next 35 years, 90% will be in Africa and Asia.