The Great Green Wall, a project of epic ambition, hopes to help a whole continent combat drought. In and across Africa rains regularly fail. And so the building of a long wall made of thousands of trees, hopes to change that - because the roots from all the trees will hold up most of the water when it rains. The wall is going to be 8,000km long and 15km wide. It will span across 11 different countries. Hundreds of African women are working on this project, and it is extremely important to the people of Africa as a whole : it could prevent mass migration, conflict, starvation as well as drought . It will go from east to west covering the deserts of Africa, called the Sahel and Sahara. The initiative is a partnership that supports the effort of local communities in the sustainable management and use of forest, rangelands and other natural resources in dry lands. It also seeks to contribute to climate change mitigation and adaption, as well as improve security in the Sahel and the Sahara. At the moment only 15% of the project has been built. But once completed in 2030, the Great Green Wall will be the largest living structure on Earth and a new Wonder of the World.