Chad Basin depth of . Due to heavy pumping, since the start of the 1980s the water levels in both aquifers has been lowered, and some wells no longer function. There is a third, much lower, aquifer in Bima Sandstones that lies at a depth of . Both the current and historical areas of the basin and the mega-basin contain concentrations of fossils. Fossil-fuels deposits in the area are estimated to exceed a trillion barrels in reserves. The Lake Chad Basin Commission was set up in 1964 by Cameroon, Chad, Niger and Nigeria, the four countries that contain parts of Lake Chad.
Chad–France relations Hollande paid a visit to Chad. France maintains an air force base at N'Djamena International Airport where it has launched humanitarian and counter-terrorism missions to the Central African Republic, Mali and Niger. In 2016, total trade between Chad and France amounted to €211 million Euros. Chad's main exports to France are primarily Gum arabic and oil. France's main exports to Chad include: medicine, flour, cereals, electronic equipment and automobiles. French multinational companies such as Air France, Le Méridien, Novotel, Société Générale and Total S.A. operate in Chad. Chad–France relations Chad–France relations refers to the diplomatic relations between the Republic of