El Niño is coming again and Australia is vulnerable.  The UN’s World Meteorological Organization declared this week that the extreme weather event has begun, and the impacts will be felt across our health, ecosystems and economy. Today, climate scientist, contributor to The Saturday Paper and a lead author for the IPCC Joëlle Gergis – on what’s headed our way and what we have to do to avert crisis.  Socials: Stay in touch with us on Twitter and Instagram Guest: Contributor to The Saturday Paper and a lead author for the IPCC, Joëlle Gergis