Summary:

The paper presents opinions concerning the influence of the electrical supply lines on the environment and people - on the basis of bibliographic data. It presents: the influence (thermal, non-thermal and anatomical effects), applied norms (electric and magnetic components, level of radioelectric disturbances, noise), confrontation of the opinions of the authors who perceive danger to the human habitat (so called "pessimists") with the opinions of "optimists" who don't seem to notice this threat.
The author determined the influence of power lines on the environment in the phase of their construction (damages and losses of land, local deforestation) and also in the phase of their exploitation (noice, radioelectric disturbances, barriers of animal migration).
Contemporary science is unable to determine clearly electromagnetic field intensity absolutely safe for man. It is necessary to carry out further research allowing, among others, to distinguish temporary negative effects on health from permanent damages.
The great role is ascribed to the rational location of power lines from the viewpoint of human habitat protection, based on the profound ecophysiographic studies.