The number of people on Earth has more than doubled in the last 50 years.
National Geographic put tons of data into a perspective. Astonishing. Take a look:
According to BBC News (July, 2012),
- In 1900, there were 1.6 billion of us.
- By 2000 the global population had shot up to 6.1 billion.
- Last year, we passed the seven billion mark.
- The best estimates have us reaching the nine billion mark before 2050.
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