The indoors environments has a great impact on our health.

Fragile lung tissue is easily damaged by indoor pollutants, resulting in increased risk of asthma and flu allergies and can sometimes lead to chronic bronchitis, lung cancer and other respiratory diseases.
Scientific evidence has indicated that the air within work place can be more seriously polluted than the outdoor air. Other research indicates that people spend approximately 90 percent of their time indoors. Thus, for many people, the risks to health may be greater due to exposure to air pollution indoors than outdoors.
“Contaminated indoor air occurs when sensitive individual expose to allergic substances triggers health problems such as eye, nose and throat irritation, sinus discomfort, headaches, sneezing and coughing, respiratory infections and fatigue.”