According to the National Institutes of Health
Electric and magnetic fields (EMFs) are invisible areas of energy and are a form of radiation. These are always associated with the use of electrical power and occur naturally in various forms, including lightning and power distribution.
So what is the problem?
EMFs can potentially be absorbed by the human body, particularly the brain, and over time, even low exposures can have adverse health effects. The evidence is becoming clear. Medical experts, scientists, and public health officials are concerned, and you should be as well.