Hot or Cool Institute is a non-profit think tank that works with experts, organisations, and practice communities on science-based actions to address the magnitude, urgency and scope of peaceful and deliberate transition towards a sustainable society. It takes a collaborative approach; working together it: conducts policy research and analysis to ground science-based approaches tobehaviour change and sustainable lifestyles; coordinates science-communications and outreach to make complex sustainabilityissues accessible; facilitates co-creation of solutions backed by researched understanding and experience; designs capacity development for implementation and tools for action at individual, business and government levels.