Ruth Metzel may have figured out a way to save a critically endangered ecosystem: build relationships with the people who live there. For a decade the ecologist has studied tropical dry forests in Panama's rural Los Santos Province. There, intensive cattle farming reflects the threat to the forests countrywide. Many farmers, proud of their traditions yet aware that land-use techniques need to change, are eager to do something about it.

Metzel co-founded Azuero Earth Project as a way to guide those who lean most heavily on the forest ecosystem toward living more harmoniously with it. "The key," she says, "is to reach people where they're at." Azuero works with cattle ranchers to identify exactly which trees -- native and fruit -- to plant on their land and where. The new growth helps form a corridor that replenishes the forest and restores habitat for wildlife, especially the critically endangered Azuero spider monkey. With over 5,000 trees planted since 2017, Metzel has high hopes for this approach.