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  "map_content": "Potential upsides (with caveats):\n- Particle reduction: Ions can make airborne particles clump and settle faster, which may lower particulate levels in some rooms. In practice, real\u2011world effectiveness varies a lot and is generally weaker than a good HEPA filter.\n- Pathogens: Certain lab tests show reduced viability of some microbes with specific ionization systems, but real\u2011world results are inconsistent and often modest.\n- Mood: A few controlled studies report small improvements in depressive symptoms with high concentrations of negative ions; findings are not consistent across studies.",
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