A boy from the Karo tribe poses for a photo in front of the Omo river in Ethiopia's southern Omo Valley region on September 23, 2016. The Karo are a Nilotic ethnic group in Ethiopia famous for their body painting. They are also one of the smallest tribes in the region. The construction of the Gibe III dam, the third largest hydroelectric plant in Africa, and large areas of very "thirsty" cotton and sugar plantations and factories along the Omo river are impacting heavily on the lives of tribes living in the Omo Valley who depend on the river for their survival and way of life. Human rights groups fear for the future of the tribes if they are forced to scatter, give up traditional ways through loss of land or ability to keep cattle as globalisation and development increases. / AFP PHOTO / CARL DE SOUZA