However, they also tend not to spend a lot of money locally, since they are present for only short periods of time. Presently, agricultural land use is relatively undiversified in suburban areas. However, there are two phenomena to note. The first is that urban sprawl is occurring in stages. The first suburban ring is ageing and becoming less attractive, while the second suburban ring (to the East) is growing. The purchasing power gradient is moving further away from the centre.