ABSTRACT
Electromagnetic elds (EMFs) have existed since the dawn of history. Geostatic magnetic elds, the electric elds of Earth’s atmosphere, and low-frequency magnetic elds exist in the natural environment. The development of science and technology at the turn of the nineteenth and twentieth centuries has led to a massive use of electric energy in all areas of the economy and in households, as well as to the use of electromagnetic waves of various frequencies in wireless communications (Figure 9.1). Articial EMFs are common and humans are exposed to complex EMFs composed of various frequencies. Workers who operate these devices may be exposed to relatively high-level EMFs; the conditions of their exposure should be controlled.
