Africa's lakes are declining rapidly, according to a new United Nations publication, with climate change and over-use the major factors.
The Atlas of African Lakes compares satellite pictures from decades past with contemporary images.
It plots changes such as the shrinkage of Lake Chad, deforestation around Lake Nakuru in Kenya, and the increasing population around Lake Victoria.
The UN says protecting these lakes is vital if poverty goals are to be met.
"The atlas shows that massive changes are happening in African lakes," said UN Environment Programme (Unep) spokesman Nick Nuttall.
"There are huge population pressures on all lake systems in Africa," he told the BBC News website, "and unless there is some way for people there to find alternative ways of living, they will continue to be under pressure."
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