EESA10H3 Chapter Notes - Chapter chap 7 : Lung Cancer, Symptom, Plywood
30 Jan 2018
School
Department
Course
Professor
Document Summary
Chap 7 jan 15: the most recent national survey of activity patterns, in 2001, documented that americans spent about 87% of their time indoors and about 69% of their time in their homes. Among adults, those in the lowest income and education brackets spent the most hours indoors at home. Working adults spend substantial time in their work environments, and similarly, children spend a lot of time in school. Most people tend to assume that indoor air is less polluted than outdoor air, the opposite is often true because the indoor setting is a confined space. In high-granite regions, indoor exposure to naturally occurring radon gas and radon progeny, which emit ionizing radiation, can be substantial, particularly in a building with a basement. Radon rises from the soil and seeps into the basement air, from where it may circulate throughout the house. Tight construction, though it is desirable for energy efficiency, allows radon to accumulate at higher concentrations indoors.
