Nigeria Sudan savannah is similar but with shorter grasses and shorter trees. Sahel savannah consists of patches of grass and sand, found in the northeast. In the Sahel region, rain is less than per year and the Sahara Desert is encroaching. In the dry northeast corner of the country lies Lake Chad, which Nigeria shares with Niger, Chad and Cameroon. Nigeria's Delta region, home of the large oil industry, experiences serious oil spills and other environmental problems, which has caused conflict. Waste management including sewage treatment, the linked processes of deforestation and soil degradation, and climate change or global warming are
Niger Basin Authority from the threats of desertification, deforestation and pollution of the rivers by agriculture and industry have become a major theme of their work. Nine nations which include part of the Niger Basin are members: Benin, Burkina Faso, Cameroon, Chad, Côte d'Ivoire, Guinea, Mali, Niger and Nigeria. While a small area of Algeria falls within the Niger Basin, it is not a member of the NBA. It is based in Niamey and works in both French and English. Ministers representing the Authority's members meet in yearly session at the headquarters in Niamey, as well as locations in the member states. Additionally,