Study finds vehicles more important source of urban atmospheric ammonia than farms
Green Car Congress
MARCH 31, 2017
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. Wallace and Hu Jun Leong of Rice University; M. and Tong Zhu of Peking University. —Sun et al.
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