• Unseen but all around us, the air we breathe in enclosed spaces is crucial to our health and well-being. • Indoor air is not simply outdoor air that has been run through a filter: it has its own chemical makeup and a unique combination of particles, gases and microorganisms. • Because indoor air has many sources of its own, concentrations of many pollutants can be as high as-or higher than-outdoor levels, especially during everyday activities like cooking or cleaning.
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- Summary
A recent study finds that large dogs emit two to four times more airborne microbes than humans, highlighting pets as a significant source of indoor microbiota. Researchers measured microbial concentrations in homes with dogs and compared them to human-only environments, noting that dogs’ fur, skin, and saliva contribute to a higher microbial load in the air. The findings underscore that indoor air is not merely filtered outdoor air; it contains its own mix of particles, gases, and microorganisms shaped by everyday activities such as cooking, cleaning, and pet presence. The study suggests that pet ownership can markedly influence indoor microbial exposure and may impact health and well‑being.
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