Question

in 1820 the world population reached​

Answer 1

Answer:

After 1800 this changed fundamentally: The world population was around 1 billion in the year 1800 and increased 7-fold since then. Around 108 billion people have ever lived on our planet. This means that today's population size makes up 6.5% of the total number of people ever born.

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Answer 2

Answer:

around 1 billion

After 1820 this changed fundamentally: The world population was around 1 billion in the year 1820 and increased 7-fold since then. Around 108 billion people have ever lived on our planet.