Earth has 3 trillion trees, says study

8 September 2015

A study by an international team of researchers says that there are 3.04 trillion trees on Earth, roughly 422 trees per person. That number is about 7 times greater than previous estimates.

But according to the study, published in the journal Nature on September 2, the number of trees has dropped by 46% almost half since the onset of agriculture about 12,000 years ago.

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