Many people spend a majority of the day indoors (particularly in the winter). Improvements in building techniques and energy efficiency have resulted in major improvements in draft-proofing and sealing buildings.
Modern homes and commercial buildings retain and re-circulate indoor air for longer periods, along with any contaminants that may be present. The ratio of 'fresh' outdoor air entering our homes and offices has been greatly reduced, increasing the potential for contaminants to accumulate to unsafe levels.
Find out more about what you are breathing and how to improve the indoor air quality (IAQ) around you.