no dangers for our gorillas here in kahuzi—biega national park.t the gorilla family, the numbers are increasing for our gorillas, and it's very important. it's a truly magical and unique experience. and using the country's resources for economic growth, when people are so poor. the congo's mineral wealth is a freak of nature. its earth is packed with metal ores like copper, coltan and cobalt, gold, diamonds, uranium, with vast scenes in this part of africa. the colonisers extracted and exploited. many bullets fired in the first world war came from congolese metal. and the uranium for the bombs that ended the second came from here. copper was the key commodity. but what was once thrown away as a by—product of that process has become its most valuable asset, cobalt. cobalt was worth nothing, until it became a key ingredient in electric car batteries. 60% of the world's supply is found in this part of the congo. once the ore has been broken up, it's a chemical refining process. sulphuric acid in these huge vats leaches out different metals. it burns