+A megacity is a vast [Urban Area](/wiki/urban_area) with a population exceeding ten million, serving as a significant global hub. These immense centers of [Human Settlement](/wiki/human_settlement) face unique challenges in infrastructure and sustainability due to rapid expansion and concentrated populations.
+## See also
+- [City Planning](/wiki/city_planning)
+- [Demographics](/wiki/demographics)
+- [Overpopulation](/wiki/overpopulation)
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