Proforestation
The great forests that have long existed on the Earth draw in huge amounts of carbon from the atmosphere. Proforestation is protecting the forests there still are, encouraging them to continue to heal and grow.
Afforestation
Afforestation is the process of planting trees or establishing a forest on land that has not been forested for a long time or has never been forested. It is a deliberate effort to create a new forest or increase the tree cover on a particular piece of land.