Not only has this year been one of the hottest on record, but there has also been a catalogue of record breaking extreme weather events. From the unprecedented bush fires in Australia to the most active Atlantic hurricane season on record, we pick apart how climate change is impacting weather systems and the lives of millions of people around the world.

Justin Rowlatt, the BBC’s Chief Environment Correspondent, and Navin Singh Khadkha, the multi-lingual environment correspondent for the BBC’s World Service, are joined by Dr Friederike Otto, associate director of the Environmental Change Institute, University of Oxford, and an associate professor in the Global Climate Science Programme; Prof Adam Scaife, the head of long range forecasting at the UK's Met Office; and Laura Meller, a Greenpeace spokeswoman on board their ship the Arctic Sunrise.