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\bibitem{Bodirsky_etal2014} Bodirsky, B. L., Popp, A., Lotze-Campen, H., Dietrich, J. P., Rolinski, S., Weindl, I., et al. (2014). Reactive nitrogen requirements to feed the world in 2050 and potential to mitigate nitrogen pollution. \textit{Nat. Comm.}, \textit{5}, 3858.

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