How can we fight climate change and transition to a clean economy? At Davos 2020, Jules Kortenhorst, CEO of the Rocky Mountain Institute, tells Hub Culture's Edie Lush that climate change is now the single most important crisis facing humanity. The good news is that humanity is waking up to the fact that this is the biggest issue that we have to address. Jules adds that we already have the tools to address the problem and outlines how we need to rapidly shift to a sustainable energy future.