Earlier this year, the UK's National Health Service (NHS) announced plans to become the first net-zero health service in the world. In this episode The Climate Press ventures on a mission to understand what this declaration means in practice for our health services.  We speak with Alexis Percival, an Environmental and Sustainability Lead with the NHS Ambulance Service, about some of the challenges and the momentum needed to even begin this journey towards becoming net-zero. We even look beyond the NHS and speak with Dr. Tim Keady, a Specialist Registrar (SpR) in Anaesthesiology with the Health Service Executive (HSE) in Ireland, about the contribution of emissions from anaesthetic gases and the importance of educating practitioners and patients about more sustainable healthcare services.