ＷＨＹ ＩＳ ＯＵＴＤＯＯＲ (ＦＲＥＳＨ) ＡＩＲ - TopicsExpress

ＷＨＹ ＩＳ ＯＵＴＤＯＯＲ (ＦＲＥＳＨ) ＡＩＲ ＡＳＳＵＭＥＤ ＴＯ ＢＥ ＣＬＥＡＮ ＡＩＲ? Outside air is clean air because Indoor air is often more polluted than outdoor air. A decrease in indoor air quality is the result of reduced ventilation and efficient construction practices, sealing homes and office buildings from the outdoor environment. Reduced ventilation contributes to the "Sick Building Syndrome" (SBS) with symptoms such as headache, fatigue, malaise, mental confusion, eye and throat irritation, coughing and wheezing. Air inside buildings contains local aerosols that are more concentrated than outdoor air. The term "dust" refers to the larger particles in the aerosol that settle on walls and furniture. A smoker in the living room of a house produces a toxic aerosol that permeates the rest of the house. Smoke particles settle on walls and every object in a room so that a smoker leaves a trail of contamination that non-smokers smell as soon as they enter the room. Indoor air contains a living aerosol of microorganisms that infect or trigger allergic reactions. Spores of bacteria and fungi are microscopic and may persist for months or years. The abundance of microorganisms, even in a very clean house, surprises most people who have tests done to assess air quality. Insects and their excretions and body parts form part of the aerosol. Allergy to dust mites is often recognized. Other mites are common and are usually not recognized.