In Ethiopia’s Omo Valley, several indigenous tribes have lived for millenniums. For eons, the annual flooding of the Omo River has provided the water they need to survive the harsh climate. A new, $1.6 billion, 1870-megawatt dam built upstream cut off the water supply in 2016 to the tribes, now numbering about 200,000 people. While the dam is a great engineering feat, these indigenous tribes’ lives, culture and traditions are in danger of being lost forever. One solar-powered irrigation system can water 25 acres of land and provide crops to feed 200 people. The cost is $100,000 – just $500 per life.