China’s Great Green Wall Grows Fast, Yet Long-Term Carbon Storage Remains Unclear
New research using satellite data finds China’s Great Green Wall—the forest belt along the Gobi and Taklamikan deserts—lets planted trees accumulate leaf area 66% faster than natural forests, with about a 4.6% edge when age- and condition-matched; the advantage peaks around 30–40 years old and then fades. While planted forests gain carbon quickly and the project has expanded regional forest cover and reduced dust, natural forests remain superior for long-term carbon storage, raising questions about the wall’s climate benefits despite local air and dust-reduction gains.
