Article: Trees and their economic importance.

 
  I. Abstract 
 II. Introduction and Classification of Trees 
III. The Economic Importance of Trees 
 A. Trees as a Source of Timber 
 B. Trees in the Restoration, Reclamation and Rejuvenation of 
Denuded and Disturbed Soils 
 C. Ecological, Ecodevelopmental and Environment Uses of Trees 
 1. Natural Purifiers of the Environment 
 2. Environment Screens 
 3. The Physical Environment 
 4. Wildlife 
 5. Urban and Rural Afforestation Programs 
 6. Road Safety 
 7. Protection of Road Surfaces 
 D. The Educational and Recreational Value of Trees 
 1. Shade and Shelter (or Avenue Trees) 
 ...

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