Vehicle Emissions as an Important Urban Ammonia Source in the United States and China

Kang Sun, Lei Tao, David J. Miller, Da Pan, Levi M. Golston, Mark A. Zondlo, Robert J. Griffin, H. W. Wallace, Yu Jun Leong, M. Melissa Yang, Yan Zhang, Denise L. Mauzerall, and Tong Zhu, Environmental Science & Technology