Manure digesters worsen ammonia air emissions from hog farms, study finds

EHN
By EHN CuratorsSep 25, 2026, 7:15 am226 ptsTrendingTop
Ammonia emissions, which can harm a person’s ability to breathe, are more than three times higher when emitted from manure that has been through a digester compared to manure that is directed into storage lagoons or sprayed on fields, according to a new study.

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