The highly creative Omo River people decorate themselves with natural materials in ways that most Western artists and fashion designers would envy. This unique expression of creativity is practiced by the Surma and Mursi tribes of the Omo Valley, bordering Ethiopia, Kenya and Sudan. German artist and environmental activist Hans Silvester photographed the whimsical designs of the Surma and Mursi for his book, Natural Fashion: Tribal Decoration from Africa, published in 2009. A hydro-electric dam has been built upriver. The Omo peoples are being forced from their lands and the Ethiopian government has forcibly removed large numbers of people from the valley. They are having trouble feeding themselves now that their land is being taken by corporate sugar plantations and the dam has disrupted the essential source of their livelihood - the natural flood cycle of the Lower Omo River. Source.
I have made an overlay of this map (download the folder linked at the top), which shows the impact of Ethiopian development on the Omo Valley. When the transparency of the overlay is reduced, development can be clearly seen on Google Earth.