Lake Chad has dryed up to almost nothing in the past few years

http://www.scienceinafrica.co.za/2003/march/chad.htm
The source is Science in Africa magazine.
Some credentials they have is the articles are wrote by real professors.
This source is kind of credible because it was in a magazine.
They says The Lake Chad Basin is shared by five countries. Its rivers used to feed into one of Africa's largest lakes. However, the waterway has been drying up and is now just a fraction of its former size.
I believe this source because they showed pictures.
http://climateprogress.org/2008/06/20/lake-chad-now-more-like-pond-chad/
The source is Tom Friedman.
Some credentials he has are he is a writer for the New York Times.
This source is not really credible because he is only a writer.
He says Lake Chad used to be the world’s sixth-largest lake, but its resources have been diverted for human use or affected by rainfall such that its been almost entirely depleted in a very short amount of time.
I don't really believe this guy but alot of people commented on his page.
http://scienceandpublicpolicy.org/scarewatch/yet_another_moment_of_fateful_decision_.html
The source is Christopher Monckton.
Some credentials he has are he works for the science and public policy institute.
This source is very credible because his job is to study these things.
He said many shallow lakes, including prominently Lake Chad, have disappeared.
I do somewhat believe what he says because he does this for a living.