The world is becoming increasingly urbanized. In Africa and China, more and more people aremigrating to cities in hopes of finding better work and education opportunities for themselvesand their families. But this growth is not always positive. Its often accompanied by a decrease inquality of life for urban denizens, as the stresses of crowding, noise, pollution and job competitivenessbegin to take their toll. At the same time, the variety inherent in city life is appealingand a major perk of living in a metropolis.