Lake Poopó in Bolivia. Photo by NASA
A depressing article by New Scientist magazine tells the story of vanishing lakes around the world. Pictured above was Bolivia's second largest lake that has recently dried up. Granted Lake Poopó was very shallow and it has dried up before, but this time it is unlikely to fill again. Its source of water, Lake Titicaca, and the river that feeds it have their own troubles.
Lakes in Europe, Australia and Africa aren't doing much better. The general consensus as to why lakes are in trouble is due to various factors including climate change, increased use of water for irrigation and silt buildup in rivers that feed into lakes. It is believed that Lake Tanganyika's reduced fish yields are due to warming water temperatures. For more in-depth information on the vanishing lakes check out the article on New Scientist.