The Millstone Times December 2021

HOME IMPROVEMENT

What’s In Your Dust (And Why Does It Matter?) Inhale. Exhale. That’s one of about 20,000 breaths you’ll take today. And with each breath, you’re taking in dust particles—roughly 50 billion per hour. Now you’re probably wondering what exactly is in those 50 billion particles. Gabriel Filippelli, a Chancellor’s Professor at the IUPUI School of Science, knows the answer. “Sloughed off human skin cells are part of the debris. So are pet skin cells, called dander, and dust mites that feed on skin,” Filippelli wrote in The Wall Street Journal in 2019. Gabriel Filippelli studies how contaminants in our environment affect our lives. In 2021, he was named executive director of IU’s Environmental Resil- ience Institute. “Overall, you can be sure that your dust also includes some decomposed insects, food debris (especially in the kitchen), fibers from carpet, bedding and clothes, and particulate matter from smoking and cooking,” he added. Indoor sources like these only account for about one-third of the dust in your house, though. The other two-thirds come from outside, tracked in on your shoes, blown through an open window, or hitching a ride in your pet’s fur. Citizen Scientists Filippelli is a dust expert. He studies how our environment, including the dust in our homes, affects our health. In fact, he’s so interested in dust that he’d like you to mail him yours. That’s right: Vacuum your house, empty the contents into a plastic bag, and send it to Filippelli. Technically, you should send it to 360 Dust Analysis. Filippelli is the prin- cipal investigator for the project, which asks “citizen scientists” around the world to send in their vacuum dust. Isheka Orr analyzes dust in the Filippelli lab. Orr, from Claflin Universi- ty, was participating in IUPUI’s Diversity Summer Undergraduate Research Opportunity Program when this photo was taken in 2018. Once your dust is analyzed, you get a report about the levels of contami- nants in your home. Meanwhile, the 360 Dust Analysis adds another data point toward its global understanding of the composition and risks—and ways to address those risks—associated with our house dust. Beyond Dust Dust is just one piece of the environmental contaminant puzzle. Filippelli is also tracking lead levels in tap water in urban areas, with a focus on predom- inantly Black neighborhoods. “It’s been consistently found that lead testing rates are significantly lower in communities of color, even as the poisoning rates are significantly higher,” Filippelli told IU News in 2021. IU is helping address this environmental injustice by providing free lead test kits to people in high-risk neighborhoods in Indianapolis and Muncie, Indiana. Lead is a neurotoxin that can cause permanent brain damage; it’s especially harmful to infants and toddlers. Spencer Strout, a student in chemistry and geology at the School of Science at IUPUI, tests a water sample for lead content in a lab on the IUPUI cam- pus. Photo by Liz Kaye, Indiana University By studying our drinking water and dust, as well as pollution, soil, and wa- terways, Filippelli is giving us a clearer picture of the world around us. With that awareness comes the opportunity to adjust our behaviors and address the risks to our health. And when we’re able to do that, we’ll all breathe a little easier. This article was originally published in the 2021 issue of Imagine magazine.

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