The Drying-Up of Lakes

http://www.mnn.com/earth-matters/wilderness-resources/photos/7-lakes-and-rivers-that-are-drying-up/bone-dry
http://en.wikipedia.org/wiki/Lake_Urmia
Africa's Lakes: Atlas of Our Changing Environment - Psugeo
http://www.search-document.com/ppt/3/drying-up-aral-sea.html