Congo: Mapping forests by their real guardians

In the forests of northern Republic of Congo, the Mbendjele are a hidden people. Living entirely on forest resources, they have co-existed with their environment for thousands of years. Their impact on the forest is so minimal that from satellite images it is impossible to detect any evidence of these people's hunter-gatherer activities. But their 'hidden existence' is under threat as logging concessions are allocated and logging companies move in to claim the timber.