Photo Gallery: Dangerous Water from the Deep
11/05/2012
Lakes like the Umm-al-Maa in Libya have been shrinking in recent years as more...
Corbis

Lakes like the Umm-al-Maa in Libya have been shrinking in recent years as more water is being removed from aquifers, lowering the water table. But experts warn that, particularly in North Africa, this water from the deep holds naturally occurring radioactive contamination that is dangerous to humans.