Why is it so important to restore degraded landscapes? It’s actually very simple.
We rely on healthy ecosystems to provide us with our food, water, clean air, climate stability, social and economic wealth; even our happiness and well-being. We only have to look at history to see the devastating consequences of not valuing or understanding ecosystems: whole civilizations have vanished after overexploiting their natural resources.

Land is of multi-dimensional character. It is multi-scale, multi-functional, multi-sectorial, multi-actor based: it needs people from practice and research to interact as equal partners to make sense of research for sustainable land management. The kind of research needed to deal with this complexity and these challenges we term implementation-oriented research. With its many practical examples, this book explores alternatives to the often perceived ‘either – or’ choice between agricultural intensification on the one hand, and expansion of arable land on the other.

Land restoration has tremendous potential to help the world limit climate change and achieve its aims for sustainable development. In its latest study, the International Resource Panel finds positive spin-offs to support all 17 Sustainable Development Goals agreed to by the world’s nations as part of the 2030 Agenda for Sustainable Development. While other reports have focused on a subset of the SDGs, this report has intentionally considered all of them, and has done so by inviting a large number of diverse authors to participate in the process.

In a world grappling with the challenges of food insecurity, climate change, landscape degradation, and rural poverty, regreening offers a path forward, especially in dryland areas. The transformation of degraded landscapes—restoring productivity and increasing resilience through the widespread adoption of agroforestry and sustainable land management practices—can deliver food, climate, and livelihood benefits.
Table of contents:
Part I. Introduction
Part II. How and Where is Regreening Happening?
Part III. The Impacts Of Regreening

For the African continent, the ability to manage trade-offs at a landscape scale has huge potential to influence the future of migration and conflict, as well as the future of land resources, food security and biodiversity. Integrated land management can act as an accelerator for achieving the Sustainable Development Goals and can be considered an essential element of a sustainable strategy to address the root causes of irregular migration.

Land take, or the change from non-artificial to artificial land cover, reflects on-going and often conflicting claims on land. Some of the land that is 'taken' for urban development is covered with an impervious surface, which severely hampers ecosystem functioning and the related delivery of ecosystem services.

The support plan for the Sahel is a regional approach to collectively address the root causes of disruptions such as poverty, migration and youth unemployment, climate change, insecurity, governance and institutional issues in the region. In this report an overview of the current situation for each of the priority areas of the UN Support Plan is presented to demonstrate that the full implementation of the plan could utilize an existing momentum of development not seen in decades in the Sahel.

Restoration is more complex than just planting trees. It requires that farmers, rural communities, businesses, and government agencies—all with different interests—unite behind a shared vision. Establishing common goals and measuring progress facilitates deeper collaboration among diverse actors.

Ecosystems and Biodiversity Facts and Figures # The IPBES Report (5) stated that “around 1 million animal and plant species are now threatened with extinction, many within decades, more than ever before in human history”.

The authors briefly review how microbial biotechnology can contribute to improve activities aiming to restore degraded drylands and to combat their desertification, which are an integral part of the Sustainable Development Goal 15 of the 2030 Agenda. Microbial biotechnology offers notable promise to improve restoration actions based on the use of biocrust‐forming engineered cyanobacteria, which play key roles in maintaining ecosystem structure and functioning in drylands worldwide.

The Great Green Wall is one of the main vehicles for delivering the Sustainable Development Goals and the Rio conventions in the Sahel. Biodiversity is the foundation of the Great Green Wall in many ways, determining soil productivity and water cycles and providing the foundation for risk management and resilient ecosystems. The Great Green Wall can make a major contribution to achieving many of the Sustainable Development Goals.

Since the mid-1980s, the positive impacts of these simple, cost-efficient water harvesting techniques become clear, following their increasingly widespread adoption. Their use has allowed smallholders to reverse land degradation, improve soil fertility, sustainably increase crop production, achieve food security, and create more productive, diverse and resilient farming systems. At the same time, groundwater is recharged, improving access to drinking water for the entire year, and creating opportunities for irrigated vegetable gardening around wells.