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It's the world's biggest - and most controversial - climate conference. But how does it actually work? And does it make a difference? Jordan Dunbar investigates.

To help get some simple answers to simple questions, Jordan is joined by climate experts-
Dr Mosunda Mumba, Secretary General of the Wetlands Convention
Professor David Victor of Innovation and Public Policy University of California, San Diego, USA
Adil Najim, Professor of International Relations and Environment at Boston University's Pardee school in the United States.

Check out the other explainers in these series including – ‘What Is Climate Change?’ and ‘Why Is 1.5 Degrees Important?’