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  2. Human - Wikipedia

    en.wikipedia.org/wiki/Human

    Choropleth map showing Population density (people per square kilometer) estimates by 30 arc-second grid in 2020: World population: 8.1 billion: Population density: 16/km 2 (41/sq mi) by total area 55/km 2 (141/sq mi) by land area: Largest cities [n 2] Tokyo, Delhi, Shanghai, São Paulo, Mexico City, Cairo, Mumbai, Beijing, Dhaka, Osaka