SciDev.Net: Some of the most severe cases of land degradation in semi-desert areas could be reversed with the right policies, researchers in Ethiopia have concluded. A study of a dry region in the north of the country, whose population had increased ten-fold and whose land had become highly degraded, found that local people have nevertheless managed to coax it back into recovery. Key to the study was a collection of sepia photographs taken during Great Britain’s military expedition to …