THE UN SAYS the global population will reach 9 billion by 2050. Six billion of that population will live in urban areas. That’s a jump of 2.5 billion city dwellers over the next 35 years.
Argue the numbers all you wish–I’m skeptical that world population will grow as fast as the UN predicts. Still, the effect on cities will be inescapable, whether the jump in city dwellers is 1.5 billion or 2.5 billion. The stresses on cities will be enormous: water, food, energy, transportation, health care, security, crime, quality of life.