Climate Change - The Biggest Challenge of All Time?

 The United Nations Climate Change Conference is set to be held in Paris this December and governments from over 190 nations across the globe must commit to an ambitious deal to rein in carbon emissions by then. Sir David King, former chief scientific adviser to the UK government and now the special representative for climate change, is busy travelling the world on a mission of climate diplomacy. We find out more about this mission and get his thoughts and proposed action plans to battle climate change, which he has called the biggest challenge of all time.