A bonus episode from the What in the World podcast.

When it comes to elephant conservation, Botswana is the world leader. It is now home to more than 130,000 elephants — or around a third of the world's elephant population. But this growing number poses major problems for humans: the animals destroy homes and crops, and even injure and kill people.

To manage its elephant population, Botswana allows so-called “trophy hunting”. Hunters from abroad pay for permits to shoot and kill elephants — and can then take a piece of the elephant home. Botswana then re-invests this income into conservation efforts. It’s a controversial practice. Animal rights activists want Botswana’s government to seek alternatives to trophy hunting, which they deem as cruel. And in Germany — Europe’s biggest importer of African elephant trophies — the government has suggested there should be stricter limits on importing them. The president of Botswana recently threatened to send 20,000 elephants to Germany as part of the dispute.

Shingai Nyoka, a BBC reporter in neighbouring Zimbabwe, explains the laws that govern trophy hunting and why they’re up for debate.

And John Murphy, a BBC News reporter in London, recounts his experience visiting an “elephant corridor” — regular routes taken by elephants in their daily commute between their feeding grounds on one side and water on the other.

Instagram: @bbcwhatintheworld