Desertification is a major environmental problem. It threatens food security, biodiversity, water security, soil availability and health. There is tons of literature regarding the causes and solutions.
Surprisingly and counter intuitively, practices we have commonly thought will prevent desertification may be wrong. This interesting TED Talk by Allan Savory shows how we may be going about preventing desertification in some areas completely wrong. I’d have to do a little more research on how exactly this works, but their experiments show great results.