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
Wildlife of Cameroon Boumba–Bek, the Boumba Bek National Park covering , and the Lobéké National Park covering (integrated with the Trinational Park of Cameroon, the Central African Republic, and the Republic of Congo and linked with an Eco-corridor to Boumba–Bek Reserve; the Campo Ma'an National Park of , which borders with the Rio de Campo of Equatorial Guinea; and the Savanna Zone comprising the Waza National Park of near Chad border, Faro National Park of area with common boundary with Nigeria, and the Kalamaloué National Park of on the Chad border. Cameroon's first protected area in the northern part of the country was