This study is part of the World Research Program for sustainable cities (ecological cities). Program coordinated by Massasuchetts Institute of Technology (MIT) and Word Resources Institute (Washington, DC).
Indeed, according to the International Development Research Center (2007), more than 60% of humanity will live in urban areas at the dawn of 2025. This concentration in urban areas is not without impact on the urban environment. It amplifies and aggravates the content and depth of the urban ecological crisis. Victims of this situation are, above all, the cities of developing countries, particularly characterized by the lack of urban planning.
Thus, faced with strong global urbanization, ekistics, a support for urban ecology, presents appropriate solutions so that we can manage to renovate environmental policies, in order to place third millennium cities in the orbit of sustainability. urban environmental.
Trees play a key role ogainst the climate change. Their population density, structure and size help us to determine the aboveground biomass they produce, contributing therefore to the climate improvement.
Our study, as a contribution to the REDD+Process (reduction of emissions from the deforestation an degradation, which request reforestation, foretsts conservation and degraded soils restoration is a response to such needs).
It aims to identify local fast growing tree species with important aboveground biomass with a 10- cm timber diametre. This will allons us to easily determine their carbon sink capacity, especially in protected areas which are important refuges for plant abd animal species.