As in many other fields, the factors and problems encountered in urban forestry vary according to a country's level of economic development. Urban people in wealthy countries mainly demand recreation and pleasure (in all their forms) from trees and forests. In their special paper on urban forestry, Nilsson and Randrup (1997) underlined the priority that should be given to inventories and to the monitoring of trees and their health (which is even more important when the trees grow in difficult conditions and when numbers of them are old), and also emphasized the attention that should be given to soil characteristics and the use of environmentally friendly production techniques (for example less use of pesticides and heavy machinery). In view of the reduction of public finances and of the high cost of land in towns and their suburbs, in his voluntary paper, Konijnendijk (1997) poses the question as to whether the management of new green spaces should be entrusted to bodies other than town and local councils. The degree of consensus on the management of green spaces within urban communities varies; the values, perceptions, interests and importance attached to the trees and forests of a town can be very different from one community to another. At the same time, successful examples of tree planting and the establishment of green spaces to commemorate festivals or special days demonstrate that it is possible to involve urban communities in this issue.
In poorer countries, rural people who have moved to the city have immediate requirements for basic products: fuelwood, low-priced building materials, food and water for drinking and domestic use. Less essential, yet necessary to improve their quality of life, are the services that trees and forests can yield in and around towns: recreation and pleasure obviously, as in wealthier countries, but even more important, protection against water and wind erosion (and against dust-and sand-carrying winds), and protection of catchment areas around towns which supply water and enable urban wastes to be disposed of safely. To meet the requirements of these rapidly expanding city populations, foresters should cooperate with urban authorities and communities and all the nongovernmental organizations involved as far as their often limited resources allow, participating more than they did in the past in designing and implementing relevant projects in this area. Foresters could contribute to specific projects, i.e. systems for purifying and recycling waste-waters, which could be used to irrigate plantations, green spaces and forest belts, and the development of semi-urban agroforestry. Concerning this last point, it is important that foresters take part in the current research and development efforts by agronomists to increase agricultural production around towns, and that they promote the use of multiple-use forest trees in town environs to provide food products, forage and fuelwood
In poorer countries, rural people who have moved to the city have immediate requirements for basic products: fuelwood, low-priced building materials, food and water for drinking and domestic use. Less essential, yet necessary to improve their quality of life, are the services that trees and forests can yield in and around towns: recreation and pleasure obviously, as in wealthier countries, but even more important, protection against water and wind erosion (and against dust-and sand-carrying winds), and protection of catchment areas around towns which supply water and enable urban wastes to be disposed of safely. To meet the requirements of these rapidly expanding city populations, foresters should cooperate with urban authorities and communities and all the nongovernmental organizations involved as far as their often limited resources allow, participating more than they did in the past in designing and implementing relevant projects in this area. Foresters could contribute to specific projects, i.e. systems for purifying and recycling waste-waters, which could be used to irrigate plantations, green spaces and forest belts, and the development of semi-urban agroforestry. Concerning this last point, it is important that foresters take part in the current research and development efforts by agronomists to increase agricultural production around towns, and that they promote the use of multiple-use forest trees in town environs to provide food products, forage and fuelwood




