| prov:value
| - Indoors, pollutants in dust and air are often generated from sources such as environmental tobacco smoke, building materials, furniture, cleaning and hygienic products, air fresheners, computers, printers, cooking and other indoor activities, and from people themselves.Over the last few decades, asthma and allergies have increased all over the world [Asher et al. 2006; ISAAC (International Study o
|