Central Africa's Lake CHAD is a large, shallow lake located in the Sahel region of north-central Africa. It is the largest lake in the region and is shared by four countries: CHAD, Cameroon, Niger, and Nigeria. Lake CHAD is an important source of water for the region, providing irrigation and drinking water for millions of people. The lake has been shrinking in recent years due to climate change and overuse of its resources. The ARAL Sea, located in Central Asia, is another large lake that has been shrinking due to human activities. It was once the fourth-largest lake in the world, but has since lost more than 90% of its volume due to overuse of its water resources.