My name is Yngvar A. Olsen and I do photography as a hobby. My profession is associate professor at the University of Agder, Kristiansand, Norway. I teach animal physiology and immunology and I also do research in fish immunology. Hiking, nature, and landscape photography is my favorite relaxation. I am concerned about the environment and the human influence on it. In particular, I am unhappy with the ever increasing carbon dioxide levels in the atmosphere (and in the ocean). Hopefully, the world will take action in time.