RE: 20 Million Trees from the sky!

What I'd love is to hear where these trees are being planted. Are they areas that are going to be untouched in the long term? How do they find land for planting when so much of our land is "government property" with regulations on what can be done with it? Do they guerrilla plant without permission? Extending on the current forests and jungles to try and expand them back to what they were would be ideal, but they were cut back for a reason and that usually means something is being done on that land. Can it be planted upon again?