Step 1 : Introduction to the question " What makes up 20 to 50% of household dust? "
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Dust in homes is composed of about 20% to 50% dead skin cells. Humans shed around 200 million skin cells each hour and they have to go somewhere when we’re indoors. The rest of dust, in offices and other human environments, is composed of small amounts of plant pollen, human hairs, animal fur, textile fibers, paper fibers, minerals from outdoor soil, burnt meteorite particles, and many other materials which may be found in the local environment.
Dust is made of fine particles of solid matter. On Earth, it generally consists of particles in the atmosphere that come from various sources such as soil lifted by wind, volcanic eruptions, and pollution.
More Info:
en.wikipedia.org
Step 2 : Answer to the question " What makes up 20 to 50% of household dust? "
Dryer lint:
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