The 2024 Critical Review (CR, Driscoll et al. Citation2024a) details current understanding and uncertainties on the sources, transformations, and effects of atmospheric reduced nitrogen (reduced N), and approaches that are available for its management in the USA, with limited reference to similar work in Europe. A valuable overview of current science, the CR also identifies research and policy needs and recommends further emissions management considerations. A management level summary of the CR is available (Driscoll et al. Citation2024b) as well as an introduction to the CR (Wierman and Schichtel Citation2024).
A&WMA invited outside experts to discuss and comment on the 2024 CR at the June 2024 A&WMA Conference. This paper summarizes their comments, which include recommendations for enhanced, coordinated monitoring (broadly and in sensitive areas), and cooperation and collaboration with Indigenous peoples. Comments also add information not covered or emphasized in the CR and discuss implications of key points. Jeffrey Collett, Greg Wentworth, and Carla Davidson were invited discussants. Another comment by independent expert, Allan Legge, is also included herein, followed by comments by Susan Wierman, Chair of A&WMA’s Critical Review Committee. Each individual’s comments are their own, not necessarily shared by other commentors. This paper concludes with responses from the CR’s coauthors, Charles Driscoll, Michael Bell, Daven Hanze, and Jana Milford.