The air around us is composed with dry air and water vapor: other elements, that are polluting components, are also present but not considered here. Dry air is a mixture of nitrogen (78%), oxigen (21%) and other gases (1%). Water vapour is water that has...

Generally, the percentage of humidity present is higher in cooler environments such as cellars or underground or basement rooms. For example, if the outdoor temperature in summer is 28 °C (82.4 °F)and the humidity 70% R.H., a cellar could have a...

Low humidity also can be harmful since excessive evaporation can irritate the mucous membranes of the nose and bronchi. Following recent studies, for a person engaged in sedentary activity and wearing light clothes, the ideal conditions of well-being occur...