And yet, today the harbour is silted up, most of the city lies buried beneath sand dunes and the land has become a desert. As the population had grown and more people wanted more fields, so more of the forest that once stood around the city was cut down, until eventually it was all gone. With no roots to hold the soil, and no attempt to conserve it, it was carried away by the wind and the rain.

Sir David Frederick Attenborough
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