At the edge of a large expanse of palaeolake deposits, southern Libya. This place was once underwater, when the Sahara was much wetter and greener between about 10,000 and 5000 years ago. That was before a previous episode of global climate change. Still, global warming might make parts of the southern Sahara wetter, as it becomes drier at the northern fringes and in southern Europe - the Sahara is expected to essentially move north as a result of global warming.
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