Nigeria, Land and Resources
Nigeria covers an area of 923,768 sq km (356,669 sq mi). At its widest, it measures about 1,200 km (about 750 mi) from east to west and about 1,050 km (about 650 mi) from north to south. The country's topography ranges from lowlands along the coast and in the lower Niger Valley to high plateaus in the north and mountains along the eastern border. Much of the country is laced with productive rivers. The Nigerian ecology varies from tropical forest in the south to dry savanna in the far north, yielding a diverse mix of plant and animal life. Human population and development pose serious threats to both the ecological and the human environment.