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.
Reforestation
Reforestation is the planting of trees where there used to be forest. It can be used to reverse the effects of deforestation or improve the quality of human life by facilitating biosequestration of atmospheric carbon dioxide.