The National Atmospheric Deposition Program (NADP)
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Beef cattle feedyards have long been known as locally and periodically significant sources of environmental air pollutants, including dust, odor, ammonia, hydrogen sulfide, and other gases. Those pollutants impose stress on the ecosystems that receive them either as air pollutants or as materials that are deposited onto land and water surfaces and incorporated by various pathways into the microbes, plants, animals, and humans that inhabit and provide services to those ecosystems. We seek to understand the magnitudes of the environmental stresses experienced by humans, animals, and ecosystems as a result of those airborne emissions AND the cost-effectiveness of management strategies - animal-nutritional interventions, veterinary tools, and direct suppression techniques - devised to reduce those emissions. We also seek to assemble an increasingly comprehensive assessment of the environmental risk posed by those emissions, including but not limited to genetic materials associated with antimicrobial resistance.