ABSTRACT
Public concern over human effects of exposure to extremely low-frequency (ELF) fields is largely based on a series of key epidemiological assessment studies. Epidemiological studies correlate historical biological data for a large population of people. Epidemiology is the study of occurrence and distribution of disease in a population. Health and safety regulations arrange electromagnetic field conditions and limits in occupational and public environments. Occupational exposure environments are studied in the context of specific industries and workplaces, particularly in the power-utility industry where high exposure to ELF fields is likely. Public environments involve all ELF exposures at residences, schools, and transport avenues. The word "leukemia," which literally means, "white blood," describes a variety of cancers that arise in the bone marrow where blood cells are formed. The types of cancers are brain cancer, breast cancer, lung cancer, skin cancer and prostate cancer.
