Multiple choice general knowledge

Seventy percent of the dust in your home comes from __________

  1. Sand particles

  2. Shed human skin

  3. Vehicular pollution

  4. Smoke due to cooking
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Shed human skin cells are the largest component of household dust. As skin constantly renews itself, tiny flakes become airborne and settle as dust. Sand particles enter homes in small amounts but don't dominate the dust composition. Vehicular pollution and cooking smoke are outdoor/indoor air pollutants but don't make up the majority of settled dust particles.

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