Desertification, Climate Change and the Developing World

"In particular, it seems like the Sahel could prove fertile ground for such efforts. For one thing, we suspect the changes in the Sahel to be particularly extreme; for another, there are already some amazing pilot efforts underway there to build greenbelts and preserve farmland. Research into turning hard-hit fallow lands into carbon forests shows promise. In addition, many of the world's future refugees are expected to come from the region, so working now to preserve people's livelihood has an air of preventive medicine to it. Why plant a billion trees to help refugees, when we might plant a billion trees to save communities... and cool the planet in the process?"
WorldChanging: Tools, Models and Ideas for Building a Bright Green Future: Desertification, Climate Change and the Developing World: