We are not-for-profit, global in scope, with a focus on climate vulnerable regions, aiming to mobilise the 50+ million health professionals worldwide to take action to improve planetary health, starting with the Caribbean, through information dissemination, research, capacity building, partnerships, and projects to scale-up evidence-informed adaptation and mitigation measures. Priorities: SDG-3 (health) SDG-13 (climate change); SDG-17 (partnerships). Major partners include Yale U, Emory U, University West Indies, U Pittsburgh, George Mason U, Pan American/World Health Organisation, Doctors for Extinction Rebellion, Global Climate and Health Alliance, Global Consortium for Climate and Health Education, TheClimateSavers, Island Innovation Network.