What are the 2 reasons why in the last 200 years we've gone from 1 billion humans to 8 billion humans on planet earth?

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18-12-2020
Geography

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What are the 2 reasons why in the last 200 years we've gone from 1 billion humans to 8 billion humans on planet earth?

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abobetybobity abobetybobity · Answer 1 · 2020-12-18T16:54:42+01:00

abobetybobity abobetybobity

18-12-2020

The world population increased from 1 billion in 1800 to 7.7 billion today.

The world population growth rate declined from 2.2% per year 50 years ago to 1.05% per year.

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