largely produced by the digestive system of ruminants, and percent of ammonia, which contributes significantly to acid rain." the environmental protection agency (epa) reports that animal waste is responsible for percent of ammonia emissions in the united states. on factory farms it's not just the animals...
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and care. learn more about animal care and service workers from the bureau of labor statistics. on this page video: animal keeper video: dog trainer video: veterinarian video: wildlife biologist video: zoo keepers video: animal keeper learn about being an animal keeper. juan shows you some of the animals...