Air quality is diminished by dust, a health hazard, and odor, a public nuisance.  Studies indicate that increased levels of dust inside animal facilities can  impact human’s physiological processes.  Compared to field dust, dust from livestock facilities is biologically active, produced in higher concentrations and provides a vehicle for transporting volatile compounds and odor molecules.  While dust can be measured, odors present a greater challenge.  What humans detect as an odor is a complex interaction of 100’s of different molecules.  Additional work is needed to establish the relationship between sensory and analytical measurements.  Strategies to improve air quality include controlling the source of dust and odors by methods such as sprinkling oil, varying feed rations and managing manure effectively.  Mechanical, electrical, biological or chemical air cleaning as well as improving ventilation effectiveness can also enhance indoor air quality.  Technologies such as using thermal chemical processes to convert swine manure to oil and separating dust and odor by centrifugal force without filtration show promise for improving air quality.  The challenge is to develop cost effective technologies.