Time spent indoors

According to research   on a sample population in Milan on weekdays issued in 1998, the population employed spend on average 59% of their time at home, 35% at the office and 6% in travelling from home to work and back. For some groups of people such as children, the elderly and the sick, the percentage of time spent at home is even higher.

Another survey issued in 1998 by  the Po Delta has shown that people spend 84% of their daily time inside buildings ( 64% at home, 3.6% travelling and only 12% outdoors).

Source; Ministry of Health: http://www.elettrosmogcontrol.com/pdf/linee_guida%20microclima.pdf


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The average time spent at school by children from 3 to 14 years is about  5h42m a day.

Source: Survey ISTAT - "Use of Time" 2002-2003

29% of the time of employed adults is spent at work indoors

Source: http://www.istat.it/it/files/2011/12/testo-uso-del-tempo2008-2009.pdf?title=Cambiamenti+nei+tempi+di+vita++-+06%2Fdic%2F2011+-+Testo+integrale.pdf37

The percentage of time spent indoors is very high

A significant percentage of the time people of all ages is spent indoors, in particular time spent at home and at workplace or studying, normally it excees 75% of the available time (18hrs).


Conclusions on indoor air pollution inconvenience

1) people of different ages spend approximately 75% of their time indoors (especially at home and at work).

2) The indoor air pollution  raises 3 different types of problems:

2.1) no serious but very common diseases (eg. colds and flu) with a high social cost - caused by biological contaminants.

2.2) Serious diseases (eg. Tumors, tuberculosis, pneumonia, ...) - caused by biological contaminants and not.

2.3) Allergies - caused by biological contaminants and not.

3) Urbanization and lifestyle (especially the power supply and the increasing number of hours spent indoors) make this problem more serious.

4) Allergies may also increase as a result of global warming and the consequent higher amount of pollen in the air.

Nowadays Air pollution indoors is an important issue, it is growing but often underestimated.