The issues of obesity and climate change are the outcomes of a carbon intensive and sedentary society as well as through the influence of vested interests in opposing positive change. In this presentation, climate action advocate and thought leader Fiona Armstrong will share the progress of the Climate and Health Alliance towards policy change at the nexus of climate change and health. Many policy changes to reduce greenhouse gas emissions to arrest global warming will also bring positive improvements in terms of tackling obesity and chronic illness. This presentation will cover the role of collaboration, stakeholder engagement and community empowerment in effecting social and policy change.