Christian Grah is a specialist in internal medicine with a focus on pneumology, intensive care medicine, psycho-oncology, tobacco cessation and anthroposophic-integrative medicine. He is a senior physician in the medical clinic and heads the Department of Pneumology and the Havelhöhe Lung Cancer Center (DKG) at Havelhöhe Community Hospital. His interest in processes for a climate-neutral healthcare system led him to help set up the "ClimateFriendlyHospital - by 2030" project at Havelhöhe Hospital and to establish a real-world laboratory together with other scientists to develop solutions. This focuses on transformation tasks in medicine for sustainable and climate-friendly medicines and medical products. He has recently become known throughout Germany for changing the behavior of medicine in Germany for climate-conscious inhalants for asthma and COPD patients.