A new commentary in Nature Geoscience highlights how tropical forests expanding into previously unforested areas can significantly increase carbon storage. This natural process offers an additional way to offset CO2 emissions and strengthen future carbon dynamics, complementing efforts to reduce deforestation. Researchers point to satellite data and field studies showing that regrowing and expanding tropical forests absorb substantial amounts of carbon. The findings support using forest restoration and natural regeneration as part of climate strategies, though questions remain about how long the carbon stays stored and how fire or land use changes might affect permanence. For carbon markets, this means tropical forest expansion could generate verifiable credits if monitoring improves. But the article also warns that carbon gains from expansion do not replace the need to protect existing forests, which store more carbon per hectare and take decades to rebuild if lost.
