The blueprint for the Great Green Wall is nothing if not ambitious. Quite Canute-like, it would seem.
The aim is to plant a forest of trees about 15km wide, snaking some 7 775km from Senegal on the Atlantic to Djibouti on the Red Sea – crossing another nine Sahelian states on the way – to halt the southward march of the Sahara into the Sahel. This elongated forest would cover about 11 662 500 hectares.
The idea was originally conceived by Nigerian President Olusegun Obasanjo in 2005 and enthusiastically embraced by Senegalese President Abdoulaye Wade. In 2007, the African Union Commission (AUC) took it up as the Great Green Wall for the Sahara and Sahel Initiative (GGWSSI). Obasanjo seems to have borrowed the idea from China, yet the Chinese precedent is not entirely encouraging. Its bricks and mortar equivalent failed to keep out the Mongolian hordes from the north in the 13th century. And China’s Great Green Wall – launched in 1978 with the aim of creating a forest of trees 4 500km long – has also not stopped the southward drift of the Gobi and other deserts, despite the planting of about 70 billion trees to date.