In Nigeria, the desert is moving from the north to habitations in the south at the rate of 600 metres per annum. This process is hastened by the process of felling trees for the purposes of use as fuel in cookstoves. Most households depend on wood and charcoal for cooking. The irony lies in the fact that of the 3 million tonnes of clean cooking fuel that Nigeria exports, the country uses only 150,000 tonnes. Read more here.