Charcoal is, by nature, a highly porous material, which is why people use it for absorbing odors and impurities
These devices work by filtering out harmful particles, odors, and gases from the air, improving the overall air quality
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A: It is definitely not just water vapor
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"It could be affecting your social life, your work life or even your tendency to get into accidents." Christopher Wanjek is the author of the books "Bad Medicine" and "Food At Work." His column, Bad Medicine, appears regularly on LiveScience