What two types of concerns do the combination of activated carbon and HEPA components in modern purifiers address based on historical drivers?
Answer
Aesthetic concerns from the 19th century (odors) and microscopic health concerns from the 20th century (particles)
Modern purifiers combine activated carbon (for odors, addressing aesthetic concerns common in the 19th century) alongside the HEPA component (for particles, addressing the microscopic health concerns driven by 20th-century science).
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