Most people tie “air quality” issues to the outside—air pollution from cars and factories or smog, haze, and ozone; however, the Environmental Protection Agency reports that a growing body of scientific evidence suggests that inside air can actually be more seriously polluted than outdoor air in even the largest and most industrialized cities.
I like to think of it this way: The air in homes originally came from outside, then we breathed in it, cooked in it, and showered in it without really doing anything substantial to improve it.
Also consider:
* We spend more time—as much as 90% of it—indoors all year round. That means nine out of every 10 breaths is of indoor air—much of it from our homes.
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