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Estimation question

How many trees are there on Earth per person?

How close can you get? Make your own guess and earn points before you look at the answer.

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Show the answer and the reasoning

The answer

366 trees

About 366 trees for each of us.

How to get there

  1. 3.04 trillion trees ÷ 8.3 billion people
  2. = about 366

Source: Crowther et al., Nature 2015

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