Here is an estimation of the amount of land it would take to grow 20 million trees. Why 20 million? The goal of the #TeamTrees project is to plant 20 million trees by 2020. Oh, you want to help? YOU CAN.
For every 1 dollar donated to #TeamTrees (with the Arbor Day Foundation - https://www.arborday.org/), they can plant 1 tree. So, that means we need to raise 20 million dollars by 2020.