Across all of Africa the impact of human activity is clear - whether in the newly irrigated areas created by the waters of the Nile, turning huge areas of the desert around Egypt's lake Nasser green, or the urban sprawl of Dakar, across the Cap Vert peninsula in Senegal.

BBC: Atlas shows vanishing landscape

Samuel Manetoali, the First Lady of South Africa, Mrs Sizakele Zuma and the Former President of the Republic of Cap-Vert, Mr Antonio Manuel Mascarenhas Gomes Monteiro.

UNESCO: MEDIA SERVICES