tree-planting program; tree-planting project
Refers to an organized initiative or business undertaking for planting trees, often used in environmental or forestry contexts.
In this area, a tree-planting program is carried out every spring.
We participated in a tree-planting project as part of our company's social contribution.
植林 is a more general term for afforestation or tree planting, while 植樹事業 specifically refers to a planned program or business undertaking.
Compound of 植樹 (tree planting) and 事業 (project, enterprise). The exact historical derivation is uncertain, but the term is a straightforward modern compound.