The Sierra Madre Oriental is one of Mexico's most diverse natural habitats. But climate change and unsustainable forestry practices are threatening the ecosystem. Parts of the mountain range have been under official protection for decades.
But that hasn't made much of a difference: the area is large and difficult to control, and it's impossible to stop people who live in the region from cultivating food crops. But Mexico's National Commission on Protected Natural Areas, helped by a German development organization, is bringing a new focus to the task of protecting biodiversity.