Niger–Nigeria relations little interest in a pan-Hausa state. The division of Lake Chad, although forced to go to mediation between Chad, Cameroon, Niger, and Nigeria, awaits formal settlement and has not been a source of tension between Niamey and Abuja. Nigeria has an embassy in Niamey, while Niger maintains an embassy in Abuja. The cities of southern Niger and Northern Nigeria have been linked in the Trans-Saharan trade going back to the medieval period. Cities such as Kano and Katsina have long been the southern terminus of trade networks which sustain much of Niger's economy. Nigeria benefits from the trade and agricultural
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,