IPBES assessments are massive undertakings. The IPBES Global Assessment alone involved 150 experts from 50 countries, donating thousands of hours of time over three years. So how is one of these assessments put together? What’s it like in the late-night negotiations behind closed doors? What makes such a colossal process worth the effort? Rob is joined by his long-time colleague and friend, Hien Ngo, to answer all these questions. Hien was the Head of the technical support unit for the IPBES Global Assessment.   You can access and read all IPBES Assessments on the website, here.    To find out more about IPBES, head to www.ipbes.net or follow us on social media @IPBES.