Health costs of air pollution from agriculture clarified

Ammonia pollution from agricultural sources poses larger health costs than previously estimated, according to research. Computer models, including a NASA model of chemical reactions in the atmosphere, were used to better represent how ammonia interacts in the atmosphere to form harmful particulate matter. The improved simulation helped the scientists narrow in on the estimated health costs from air pollution associated with food produced for export -- a growing sector of agriculture and a source of trade surplus.

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