The objective of this paper was to verify that problem of indoor air pollution is present in primary school in Yugoslavia. Indoor air pollutant levels of sulfur-dioxide, soot, nitrogen dioxide, carbon monoxide and formaldehyde, and air-microflora was determined in different places of school environment. The average indoor level of sulphur dioxide and soot in primary schools were comparatively high. Determined average levels of carbon monoxide were from 13 .2 - 31. 8 mg/m3, levels of nitrogen dioxide were 20 - 62 μg/m3 and levels of formaldehyde: 0.01 - 0.83 μg/m3.

This case study conducted in a new air-conditioned building in Singapore was aimed at identifying, and assessing indoor levels of VOCs using a GC-MS method. The study identified 80 different compounds with Toluene appearing in all locations. Most VOCs detected were from building materials, adhesives, varnishes, sealing compounds, polyester carpets reflecting the age of the building and vehicular emissions reflecting the poor positioning of the air intake.

Measurements of VOC, formaldehyde, temperature, relative humidity, ventilation and inspections of humidity related problems were made in 178 randomly selected Swedish dwellings. More than one hundred single VOCs was identified with a mean concentration less than 25 μg/m3. The concentration of 80% of the identified VO Cs were less than 10 μg/m3. One-family houses had a higher concentration of VOCs than multi family houses.

The aim of the study was to follow changes in allergens and airborne particles in the indoor environment during the first year in a newly started school. The building is from the sixties and was refurbished during the summer to be made suitable as a school. New internal walls and some new flooring were installed, and walls and ceilings were redecorated. Most of the furniture, textiles and lamps are new. Samples for allergen determination were collected by sampling settled dust with a vacuum cleaner. Airborne allergens were collected by a newly developed method involving an ionisator.

The association of moisture damages of school buildings with microbial indoor air quality and health status of school children was studied. To determine the association the school buildings (N=32) were divided into the moisture damaged (index) and non-damaged (reference) schools according to technical inspection data. Children's health surveys were made by questionnaires. Microbes were determined from indoor air of school buildings using a six-stage impactor. Children in the index schools reported more respiratory symptoms compared to children in the reference schools.

Repeated measurements were taken in a printers' office where one case of humidifier lung disease had occurred. In water supplies of the office's air conditioning systems, the number of moulds was mainly below 50 colony-forming units (CFU)/mL, the quantity of anaerobic bacteria mostly below 10,000 CFU/mL. Twenty-nine out of the 120 participating employees complained of symptoms such as dyspnea, cough, malaise whose majority was not associated with the workplace. Twenty-eight had IgG antibodies to humidifier antigens prepared from water supplies of the air conditioning systems.

An intervention study in eleven schools with approximately 1000 children age twelve to thirteen has been carried out in the period 1997 to 1999. Four schools with poor ventilation standard, three schools with carpets and four reference schools participated. In the schools with carpets, these have been removed and in the schools with poor ventilation systems, these have been upgraded to Norwegian standards for new buildings. A questionnaire was answered three times during a two-week period, asking how indoor environment-related symptoms were perceived.

The United States Environmental Protection Agency (EPA) has collected extensive indoor air quality data in 100 randomly selected office buildings following a standardized protocol developed for the Building Assessment Survey and Evaluation (BASE) study. These data were collected to provide normative data in typical office buildings for various uses including: a) basis for making policy and guidance development; b) hypothesis development and testing; c) input into risk assessments and environmental models; and, d) comparison of complaint buildings to "typical" building stock.

This paper describes research on the extremely low frequency (ELF) end of the electromagnetic spectrum from VDUs, because this is very close to the frequencies of the brain when it is concentrating. Our most recent experiments involve the use of an alpha oscillator which when stimulated with magnetic radiation from VDU's emits frequencies which peak around 12 Hz. The oscillator neutralises ELF emissions from the VDU by resonance thus acting like a tuning fork.

Numerous scientific studies show that indoors are the source of potentially harmful substances called indoor air pollutants. They come from various sources. Indoor levels are often much higher than outdoor level and most people spend the bulk of their time indoors. As indoor air pollution is relatively new problem, health and comfort problems are associated with it. The starting point for studies on constituents of the indoor environment is to realize that the problem to be solved is complex.