The term "sick building syndrome"  was first used at the beginning of the 1990s. The term was defined as the medical/ecological problem associated with multi-purpose indoor impact on human health. In 1983, the World Health Organisation's (WHO's) work group report, described the main and composite  "sick building syndrome" causes.

With regard to the surrounding, ecologically unfavorable environmental conditions, in particular, that of air, water and soil pollution. However, depending on lifestyle and work, most of modern man's time (80-90%) is spent indoors. And, of course, the indoor space has a huge impact on people working or living in them. According to ecologists evaluation, indoor air can be 4-6 times more polluted than air outside. In 1992-97 a team of researchers from Italy, Russia and the U.S., carried out a special air quality study in residential and public buildings. Results showed that 25% of  materials discovered in indoor air have harmful effects on people. WHO experts came to the conclusion that the quality of the air inside, is more important to human health and welfare than the air that surrounds us outside.

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