There is a growing body of scientific research on the biological effects of EMF on multi-cellular organisms and the EMF Health Effects. It is not rocket science to understand that those biological effects can adversely affect your health. Some EMFs are beneficial to your health, others positively harmful (particularly over time).
To reduce the EMF health effects, there are a number of strategies which can be employed. Starting with changes to the way you use technology and the use of EMF protection and shielding.