Dr Mark Harber is an associate professor (UCL) and consultant Nephrologist at the Royal Free and has been in his current post since 2005. As well as general nephrology Dr Harber has a specialist interest in transplantation and infectious disease associated with this. He has a keen interest in the impacts of the climate crisis on health and how individuals and institutions in health care can contribute to mitigating the crisis and sustainability. Dr Harber also promotes links with renal units in resource poor countries.