A new study finds that up to 215 million hectares of land (an area larger than Mexico) in humid tropical regions around the world has the potential to naturally regrow. That much forest could store 23.4 gigatons of carbon over 30 years and also have a significant impact on concerns like biodiversity loss and water quality. The study showed that more than half of the area with strong potential for regrowth was in five countries: Brazil, Mexico, Indonesia, China, and Colombia. A new global map the authors produced of potential regrowth areas is a boon to environmentalists worldwide hoping to advocate locally for their efforts.