The result of the project that seeks to determine the rate of urban trees by population in the cities of Riohacha and Maicao, It was socialized to the mayors, municipal authorities, community leaders and community in both municipalities.

With the completion of this study, Corpoguajira bets on the challenge to build biodiverse and sustainable cities, and it is consistent with the risks generated by population growth in demand and pressure on natural resources. In colombia, 75% of citizens now live in urban areas and it is estimated that the 2050 au mentará the 85%, according to figures from NPD and the World Bank.

The study carried out between Corpoguajira and Preserve Corporation contributes to the fulfillment of specific objectives related-two sustaining and conducting ecological processes, guaranteeing ecological connectivity and the availability of environmental services in the municipalities in question; raise environmental quality and balance supply through the territory corresponding to the peopling and demand; encourage sustainable ownership and promote public enjoyment of environmental offer par-te of citizenship.

The sample for the study was 20 barrios per municipality, The results indicate that Rio-ax index arborization per person is around 7,88 m², while in Maicao reaches the 9,38 m²; not very distant from the WHO recommendation.

An additional result indicates that in Maicao the arbola-do in the census districts is 15.483, represented in 108 species and 42 families. In Riohacha also threw the tree inventory 13.429 planted trees distributed in 110 species and 43 families. Among the species there 61 which they are exotic.

In addition arborización index by population, the identification of the ecological structure and identifying critical areas, the study allows the construction of a woodland plan for each city, giving priority species suitable for soil and climate, They include-do strategies for preserving ecosystems on arborization.

The study measuring arborado meets national guidelines, defining ecological structure nationally, It is also covered in the pro-pósito UN Habitat program through, It is including the recommendation of the World Health Organization (WHO) of 9 m² of green area per person to ensure sustainability index in cities.