Cities and Environmental PlanningMORE
An estimated 4 billion people—equivalent to approximately 54 percent of the world’s overall population—reside in cities. The global urban population is projected to escalate to 66 percent by 2050. The UN, however, claims that the current rise in the cities' population is unsustainable. Many cities do not have enough resources to sustain the projected population growth. Cities experience sustainability issues such as pollution, public health problems, overcrowding and social instability. These issues can lead to resource depletion and potentially low worker productivity, which can cause greater inefficiencies within cities that impact productivity.