Dr Mark de Souza is the Chair of the Sustainable Healthcare Committee, (Top End Region, NT Health), Senior Staff Specialist in Emergency Medicine at the Royal Darwin and Palmerston Regional Hospitals in the Northern Territory. Mark is the leader of the volunteer-led greening program of the Royal Darwin Hospital site. Mark has been responsible for coordinating the mapping of land surface temperatures, integrating Indigenous perspectives, and providing justification for the rationale for site and plant species selection.