While surveying the Angolan Highlands, scientists discovered deposits of peat that filter and feed clean water into the Okavango River Delta. For thousands of years these peatlands have been absorbing carbon dioxide from the atmosphere, but are now threatened by human impact. // Now, through a five-year partnership, debeersofficial is joining National Geographic to help protect the source waters of the Okavango Delta, which is a lifeline for endangered species and more than a million people. #OkavangoEternal on.natgeo.com/3sbCYKG