Land is our natural ally. But the natural conditions of land and soils are not eternal, and must be protected. Soil is the most significant geo-resource we have for ensuring water, energy and food security for present and future generations. Healthy soils are also vital for building resilience and adapting to climate change.

Ce livre constitue un ensemble d’informations de base sur la désertification, la dégradation des terres et la sécheresse à l’échelle mondiale, accompagnées d’une série de graphiques. Celui-ci présente les évolutions ayant eu lieu au cours des dernières décennies, en associant les questions et les priorités actuelles.

Este libro tiene como objetivo ser un manual informativo en el que se cuenta “la historia” de la desertificación, la degradación de las tierras y la sequía a escala global acompañado por una completa serie de gráficos. Este libro muestra tendencias que han tenido lugar a lo largo de las últimas décadas, combinando y conectando temas y presentando prioridades.

This book is intended as a basic information kit that tells “the story” of desertification, land degradation and drought at the global scale, together with a comprehensive set of graphics. The book indicates trends as they have taken place over the last decades, combining and connecting issues, and present priorities.

This book is intended as a basic information kit that tells “the story” of desertification, land degradation and drought at the global scale, together with a comprehensive set of graphics. The book indicates trends as they have taken place over the last decades, combining and connecting issues, and present priorities.

This book is intended as a basic information kit that tells “the story” of desertification, land degradation and drought at the global scale, together with a comprehensive set of graphics. The book indicates trends as they have taken place over the last decades, combining and connecting issues, and present priorities.

The earth’s climate is changing at a rate unprecedented in recent human history and will continue to do so for the foreseeable future. The impacts and risks associated with this are global, geographically diverse and increasingly being felt across a range of systems and sectors essential for human livelihoods and well-being. The more severe and far-reaching the impacts of climate change are, the greater the loss of species will be, and the greater the deterioration of drylands and the risk of desertification and land degradation around the world will be.

The Africa–Asia Drought Risk Management Peer Assistance Project seeks to facilitate the sharing of knowledge and technical cooperation among drought-prone countries in Africa and Asia and thus to promote best practices in drought risk management (DRM) for development in the two regions. In order to establish a baseline to guide this activity, the United Nations Development Programme Drylands Development Centre (UNDP DDC) undertook a stocktaking exercise between March and June 2011 on drought impacts, causes, trends and solutions in Africa and Asia.

Land is defined as a system engaged in generating biological productivity. It is the earth’s infrastructure for life. The rate and quality of production generated from the land depends on its major components, soil and its fertility. Soil organic matter, derived from the vegetation supported by a particular soil, is the major component that controls soil fertility.

Les terres3 peutvent se définir comme un système destiné à générer de la productivité biologique. C’est l’infrastructure naturelle qui supporte la vie sur la planète. La quantité et la qualité de cette production dépendent du principal composant de la terre : le sol et sa fertilité. La matière organique du sol, qui provient de la végétation portée par ce dernier, est le principal composant influençant la fertilité du sol.

La tierra se define como un sistema bioproductivo. Es la infraestructura terrestre para la vida. La tasa y la calidad de la producción generada por la tierra dependen de sus principales componentes, de los suelos y de su fertilidad. La materia orgánica del suelo, derivada de la vegetación que crece en un suelo determinado, es el principal componente que controla la fertilidad de éste.

Land is defined as a system engaged in generating biological productivity. It is the earth’s infrastructure for life. The rate and quality of production generated from the land depends on its major components, soil and its fertility. Soil organic matter, derived from the vegetation supported by a particular soil, is the major component that controls soil fertility.