Can the past teach us how to fight climate change?

Why farmers around the world are bringing back ancient crops - and ancient animals! We meet the "potato guardians" of the Peruvian Andes and hear about a scheme to bring back bison to Britain.

Presenters: Graihagh Jackson and Jordan Dunbar Reporter in Peru: Beth Timmins Sound Mix: Tom Brignell Editors: Simon Watts and Sophie Eastaugh

If you have a question, email us at [email protected] or leave a WhatsApp message at + 44 8000 321 721