High levels of carbon dioxide in a building can result from _____.

a. emissions from building materials and furnishings
b. incomplete combustion in fuel-burning equipment
c. bioaerosols emitted from houseplants in the building
d. the breathing of the building’s human occupants


d. the breathing of the building’s human occupants

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Noninfectious diseases are usually caused by ____ problems

A) parasite B) environmental C) ?nematode D) bacteria

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In _____, an extension of the Morrill Land-Grant Act added historically black colleges

a. 1800 b. 1890 c. 1940 d. 2002

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The most obvious way in which a wall, floor, ceiling, or roof can slow the spread of fire is by having a fire-resistant ____.

A. alarm B. fill C. surface D. core

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As the air filter gets dirty, the static pressure drop across the filter

A) stays the same B) increases C) decreases

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