Temperature, humidity, mobility, barometric air pressure are the main meteorological elements that characterize the physical properties of the air, weather and climate. Man is constantly exposed to these natural factors. The natural physical state of the air environment is far from always adequate to its physiological needs. In order to prevent its adverse influence, a person seeks protective equipment. He creates an artificial environment, surrounding himself with a microclimate of the clothes area, the state of which is regulated by a change in clothes. It is protected from the weather by the artificial micro-climate of the home, industrial premises and public buildings. Through planning activities, building density and landscaping, a person changes the microclimate of a residential quarter, microdistrict, city.
Thus, through protective measures, a man-made artificial air environment is created, the physical properties of which must comply with sanitary standards and, therefore, prevent diseases, provide optimal working conditions and human well-being.