Training schools for orangutans form part of a project by the Frankfurt Zoological Society on the Indonesian island of Sumatra. Orangutans bred in captivity are prepared for life in the wild and then released into the Bukit Tigapuluh National Park.

Arnol Aarón Purizaca Musayón is 15 years old and lives in northern Peru. He is the eldest of three brothers. Arnol hopes to become a doctor or teacher one day. In his free time he likes to surf and play guitar.

War has devastated the central African wilderness. Rebel groups forage for food or sell ivory, gold and diamonds to buy weapons. Since the beginning of 2017, Luis Arranz has been working for WWF in Dzanga-Sangha Protected Areas.

30,000 people live in a refugee camp in Kaga-Bandoro, a town in the northern Central African Republic. They have fled violence. Attacks on the civilian population are commonplace. Around 600,000 people are now displaced in their own country.

Matjaž Juren organizes pub crawls for tourists. After completing his studies at the University of Ljubljana, he wanted to be independent from his parents. That brought him to the German capital, Berlin.

The cotton-top tamarin weighs under a pound and is known for its striking white fur crest. But deforestation in its habitat, the Colombian rainforest, has put the monkey at risk of extinction. The NGO Proyecto Tití is fighting for their survival.

The impact of climate change is painfully apparent in Mali. Prolonged drought has had a devastating effect, and is forcing farmers to think of new solutions.

The cotton-top tamarin weighs under a pound and is known for its striking white fur crest. But deforestation in its habitat, the Colombian rainforest, has put the monkey at risk of extinction. The NGO Proyecto Tití is fighting for their survival.

In Serbia, Mangalitsa pigs dig up forest floors in search of acorns, helping create fertile alluvial soil. But pig herders are a dying breed. Is the tradition at risk?

Youbah Mohammedou Ghahra lives in Diama. When school's out he likes to play football with his friends. And he's ambitious – when he grows up, he wants to be president of Mauritania.