The Conversation

How we found out there are three trillion trees on Earth

Author: The Conversation USA

Satellites weren't enough to get a global number. nosha/flickr, CC BY-SA

Trees occupy much of the Earth’s land surface. Many of us interact with them on a daily basis, whether driving down a rural country road, back-country skiing, or having a picnic in a city park. Whether large and small, trees play a wide range of roles in our global...

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