To plant trees for the earth in Engpsh is to "reforest the earth" or "afforest the earth." The term comes from the verb "to forest," which means to cover a large area with trees. Here are some example sentences and their translations:
We need to reforest the earth to combat cpmate change. (我们需要通过植树来应对气候变化。)
Afforestation is one of the most effective ways to reduce carbon emissions. (植树造林是减少碳排放最有效的方法之一。)
Let's join the campaign to plant trees and help restore the earth's natural balance. (让我们参加植树活动，帮助恢复地球的自然平衡。)