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
Chad–Cameroon Petroleum Development and Pipeline Project Cameroon, and that the revenues be put towards improving social and economic conditions. Since 1990, President Idriss Deby has been the head of government in Chad, where presidential elections are held every five years. Chad's economy is dependent mainly on agriculture and livestock. It heavily relies on foreign assistance and foreign capital, as well as international investment projects. Because of Chad's landlocked borders, its economy struggles from a lack of resources and instability between rebel groups. The country also serves as a host to thousands of refugees from neighboring Sudan and Central African Republic, as well as many victims of