We may not realize it, but all of us use and benefit from wild species. Algae, fungi, plants and animals - from medicine to food, they’re important parts of our quality of life. But the IPBES Global Assessment identified over-exploitation of species as one of the main drivers of change in biodiversity. So how are we using wild species? Is there such a thing as sustainable use? How does illegal trade play into all this?   This week, Brit talks to two guests. Dr. John Donaldson is a biodiversity scientist and one of the Co-chairs of the IPBES Assessment of the Sustainable Use of Wild Species, due for release later this year. Ivonne Higuero is the Secretary-General of CITES, the Convention on the International Trade in Endangered Species of Wild Fauna and Flora.   To find out more about IPBES, head to www.ipbes.net or follow us on social media @IPBES.