Study finds vehicles more important source of urban atmospheric ammonia than farms
Green Car Congress
MARCH 31, 2017
The presence of NH 3 in vehicle exhaust greatly enhances the formation and growth of secondary inorganic aerosols. The researchers outfitted vehicles with sensors to detect ammonia levels and focused on six cities: Philadelphia, Denver and Houston in the United States, and Beijing, Shijiazhuang and Baoding in China. —Sun et al.
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