Sculptor Mark Coreth and the curved life-sized ice polar bear (photo: Patrick Riviere) Sculptor Mark Coreth and Robert Purves AM at Sydney Ice Bear, 2011 (photo: Patrick Riviere) Dripping water from melted Ice Bear (photo: Patrcik Riviere) Half melted Ice Bear revealing its bronze skeleton (photo: Patric Riviere) Australian Youth Climate Coaltion (AYCC) (photo: AYCC) Powershift, Australian Youth Climate Coalition (photo: AYCC) Natalie Issacs, founder of 1 Million Women speaking at Sydney Ice Bear event (photo: Patrick Riviere) Four Degrees or More? Conference (photo: 4 Degrees Conference) Robert Purves AM speaking at an Earth Hour event Aerial view of Skullbone Plains, Tasmania (photo: Matthew Newton) Skullbone Plains, Tasmania (photo: Grant Dixon) Robert Purves AM, Director of Purves Environmental Fund