Sequestering carbon to mitigate global warming.

Results from the latest studies indicate that reforestation is a major component in atmospheric carbon reduction.  The area required to make a dent in the problem exceeds the abilities of private individuals and not for profit organizations.  Public lands under legislative control are subject to the constraints of national budgets and political agendas. Most governments view carbon sequestration as an unavoidable white elephant. They don't know what to do with it, but it won't go away.

Where are the billions of required trees going to be planted?  You go back to the beginning.

Many areas around the world that have been deforested in hopes of economic advancement have lost their fertility for agricultural purposes and become scrubland.  The failed economic advancement results in farmers being forced to harvest a crop that requires more time to produce than the value of the crop justifies.

Those same areas can be restored to healthy stands of timber without altering the use of land that is currently providing space for habitation, recreation or abundant production of food.  Bringing back the balance of forest to cropland encourages the restoration of air and water quality, provides jobs and economic stability.