Let's just acknowledge that with 7 billion people needing food grown (not to mention living space), we as a race will not be replanting more forests than existe

Let's just acknowledge that with 7 billion people needing food grown (not to mention living space), we as a race will not be replanting more forests than existed 800 (or even 100) years ago. Growing forests and growing food is not mutually exclusive. See the organisation I link to at the bottom of the article. They plant trees as part of agro-forestry projects, which provides both trees and food for those who carry out the projects. As far as living space for even 10 billion people... the trend is for people to move to cities, which almost by definition have a very high population density per unit area. Which is to say, the living space will take up a very small percentage of land. Can we sequester all the carbon in the atmosphere that we release by replanting forests? I don't know. But I'm sure there have been studies done, with hard numbers on what kind of resources it would take.