There is an ongoing project to stop desertification in the Sahara that seems to be successful. It involves planting vegetation in a specific configuration: http

There is an ongoing project to stop desertification in the Sahara that seems to be successful. It involves planting vegetation in a specific configuration: https://en.wikipedia.org/wiki/Great_Green_Wall_(Africa) https://en.wikipedia.org/wiki/Great_Green_Wall_(Africa)