Tree-planting is the process of transplanting tree seedlings for forestry, land reclamation or landscaping. Due to the fact that trees absorb carbon dioxide from the air, planting trees is used a geoengineering method to remove carbon dioxide from the atmosphere.

In some parts of the world where deserts are prominent, tree-planting beyond improving air quality it can also boost biodiversity and conservation of water systems, while promoting improved economic and social welfare from creation of jobs, better access to water and food and creation of communities.