generated by industrial activity. Another type of buffer zone used in urban plan-
ning is a green belt, which is typicallya circular zone around or within the city
in which development of any kind is prohibited or curtailed. Such belts are fre-
quently placed around residential areas to provide recreational space in the form
of parks and wilderness areas and to shield the residential zone from transportation
or commercial activity on the far side of the green belt.
Buffer Zone 43