## 1 Introduction  
Over the centuries, humans as biological organisms have lived and developed in an environment in which the electric field (EF) and magnetic field (MF), which are part of the electromagnetic field (EMF), have played and still play a very important role, presenting two pillars sustaining life on Earth. However, since the industrial revolution and the emergence of modern electricity, the inevitable technical and technological progress has been gradually polluting the human environment, exposing humans to various artificial sources of EMFs of the intensities unknown in nature. Further discoveries of electromagnetism and electromagnetic waves attributed to such great names as [PERSON], [PERSON], [PERSON] and [PERSON] and the invention of the radio as a means of distance communication began the era of the omnipresence of EMFs in the human environment. Nowadays, humans as biological organisms are surrounded by different EFs and MFs emitted from numerous sources of various intensities, such as electrical machines, devices or domestic appliances, not to mention computers, mobile phones, etc. One of the side effects of each working electrical device is EMFs generated near their workplaces. These fields interfere with various elements of the environment, among which all living organisms are of the greatest concern. Therefore, it is important to accurately determine the nature and the side effects of its impact. Every day, living organisms, including humans, are exposed to the influence of different types of fields of different physical parameters, at a wide frequency (_f_) range. Electrical devices such as mobile phones, microwave ovens, television or radio transmitters emit electromagnetic radiation (EMR) with a frequency \(f\) from 300 MHz to 300 GHz. A portion of this radiation is converted into kinetic energy, which then transforms into heat. This heat can negatively affect health in various ways [1]. On the other hand, the lower frequencies from the radio spectrum frequencies from 100 kHz to 300 MHz range do not cause such phenomena. What should be pointed out is that, during the radiation of high-frequency fields, i.e., above 100 kHz, accompanied with the fields of high intensities, non-ionizing radiation phenomena occur [2; 3]. Another type of radiation can be found in the case of low-frequency fields caused by, e.g., power lines (_f_ = 50 Hz or 60 Hz). It is believed that such fields have a quasi-stationary character, and the two components of EMFs, i.e., the electric field (EF) and the magnetic field (MF), can be considered separately [2]. Nowadays, the opinions of the research community about the effects of radiation attributed to different fields on living organisms are divided. This is due to the fact that earlier studies have not unambiguously shown a negative impact of EMFs. Already at the beginning, at the turn of the XIX and XX centuries, there was a widespread view (e.g., in medical textbooks) of the positive impact of EFs and MFs on humans [2]. In the 1950s and 1960s, with the development of science trying to describe the radiation phenomena, this view gradually disappeared, and the view about the neutral effect of EMFs on living organisms began to dominate [2]. The first study that reported the potentially harmful effects of MFs on living organisms was an epidemiological study published in 1979 by [PERSON] and [PERSON] [4]. In this study, children from the city of Denver, CO, USA, who lived in homes exposed to MFs of higher intensities were tested. This intensity was estimated based on the number of transmission lines near homes and the number of power lines transmitting electricity to homes. It was noted that children exposed to MFs had a \"slightly higher\" risk of developing leukemia compared to other children who were not exposed to such radiation. The authors developed their own code [5] in which they managed to visually determine the level of this exposure (based on the number of lines in the area of residence).