China battled Gobi Desert expansion with the 1978 "Great Green Wall" tree project.
Early failures such as straw checkerboard grids to trap moisture and using native, drought-resistant species.
By 2020, 21 million acres were restored; a 2896km green belt now shields the Taklamakan. This reforestation, responsible for 1/4 of global greening, reduced sandstorms and boosted local economies, inspiring global desertification efforts.