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. —Sun et al. The laser-based sensors were smaller, easier to work with and more accurate than previously used sensors, Zondlo said.
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