世界人口增速，三哥高居第一

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未来世界是三哥的？​

World Population Clock: 7.9 Billion People (2021) - WorldometerHow many people are there in the world? World population has reached 7.7 billion. World population live counter with data sheets, graphs, maps, and census data regarding the current, historical, and future world population figures, estimates, growth rates, densities and demographics
www.worldometers.info