Australian scientist Joëlle Gergis was one of the lead authors on a landmark climate report by the IPCC. The report has been described as “code red” for humanity, a desperate attempt by the world’s best climate scientists to force political leaders to take action and stop runaway climate change. Today, Joëlle Gergis explains the science behind it, what it tells us about the future of our planet, and how we can all maintain some hope.