Indoor air quality is an often-neglected factor in health and wellness. Here's how to assess whether yours is beneficial or harmful.

Indoor air can be three to five times more polluted than outdoor air, according to the U.S. Environmental Protection Agency, which also notes that most people spend 90 percent of their time indoors. Fortunately, you can test your indoor quality by yourself and with the help of a professional to determine if you have a problem. And in a world of increasing wildfires and invisible irritants, we’d recommend it. We at PopSci always want to ensure we’re giving you the best advice, so we consulted with a team of experts to explain why and how to measure air quality and take steps to correct it in your home.

“The average person breathes 20,000 breaths per day—yet air quality is typically the last thing we think of, if at all, when it comes to ongoing wellness,” says Michael Rubino, mold and air-quality expert, environmental wellness advocate, and founder of HomeCleanse. He also hosts the “Never Been Sicker” podcast and is chair of Change the Air Foundation.

Rubino explains that our air plays a significant role in our ongoing wellness. “If the air is filled with VOCs, mold, bacteria, allergens, pesticides, lead, or a number of other things, that will negatively impact our health,” he says.

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