and now its dust (from what used to be the sediment on the lake bottom) is causing coral reefs to die in the Caribbean, and creating an asthma epidemic there as well..
http://www.grida.no/climate/vitalafrica/english/14.htmLake Chad and the Aral SeaLake Chad and the Aral Sea: A sad tale of two lakes
When I studied African politics about 40 years ago with visiting Lincoln University professor John Marcum at the University of Pennsylvania, Lake Chad was immense in surface area. It was the fourth largest inland water body on the African continent. The lake's surface area in 1963 was about 25000 square kilometers. The lake is very shallow, on the order of 5 to 8 m deep. Its waters provided livelihoods for fishermen as well as for settlements, cultivators and herders. The Chari and the Longone rivers are the major ones that feed the lake, a land-locked lake with no outlet to the oceans.
"The lake is shared by Cameroon, Chad, Nigeria and Niger which, along with CAR (Central African Republic), make up the Lake Chad Basin Commission (LCBC), whose name in French is the Commission du Bassin du Lac Tchad (CBLT). Its basin extends over 967,000 sq km and is home to about 20 million people, according to LCBC. These include 11.7 million in Nigeria, 5.0 million in Chad, 2.5 million in Cameroon, 634,000 in the CAR and 193,000 in Niger" (www.irinnews.org; March 21, 2003).
The Lake Chad Basin Commission is an organization designed to manage the basin and to resolve disputes that might arise over the lake and its resources.
Being on the fringe of the Sahara, high temperatures assure that evaporation rates of the lake's water would be high (estimated at 2000mm/year). Rainfall (about 1500mm/year in the south and 100mm in the north of the basin) has been another source of its water.
Today, the surface area of the lake barely reaches 1350 square kilometers. According to a BBC news report (March 24, 2004), "Nigeria's president has warned that Lake Chad will soon disappear unless immediate action is taken." Once the fourth-largest African lake (and the sixth largest lake in the world), today, is on its way to extinction.