| Hiepaiplova | Дата: Понедельник, 11.11.2013, 16:35 | Сообщение # 1 |
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Группа: Гости
| Consumption of natural resources, encroachment on land, and emission of pollutants have, together produced strong indicators of environmental stress. Examples of such stress include depletion of the ozone layer and of many natural resources, massive loss of topsoil and of biological diversity, http://terrawork.comuv.com and potential causes of global climate change including increased atmospheric concentrations of carbon dioxide and other greenhouse gases. Ventilation for acceptable indoor air quality is one of the key services a building provides to its occupants. Indoor air quality depends on a complicated interaction between pollutant sources in the building and key removal mechanisms such as ventilation.
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