Write about the trend of population growth in the world.
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Population growth is the increase in the number of individuals in a population. The global population has grown from 1 billion in 1800 to 7.774 billion in 2020. It is expected to keep growing, and estimates have put the total population at 8.6 billion by mid-2030, 9.8 billion by mid-2050 and 11.2 billion by 2100.
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