Michal Krzyzanowski is an environmental epidemiologist, holding honorary position of a Visiting Professor at the Environment Research Group in the School of Public Health of the Imperial College London. He has been active as an expert consultant for WHO, UN Env and other organizations, a.o. as a member and co-chair of the WHO Guidelines Development Group and a member of the HEI Global Health Oversight Committee. Until 2012, he was a Head of WHO European Center for Environment and Health.