RT Report
T1 Frontiers 2018/19: Emerging Issues of Environmental Concern - Chapter 4
T2 氮固定：从氮循环污染到氮循环经济
T2 La solution de l’azote : de la pollution du cycle de l’azote à l’économie circulaire de l’azote
T2 Фиксация азота: от циклического загрязнения азотом к экономике, обеспечивающей рециркуляцию азота
T2 La fijación de nitrógeno: de la contaminación por el ciclo del nitrógeno a la economía circular del nitrógeno
A1 United Nations Environment Programme, 
A2 Sutton, Mark
A2 Raghuram, Nandula
A2 Adhya, Tapan Kumar
A2 Baron, Jill
A2 Cox, Christopher
A2 de Vries, Wim
A2 Hicks, Kevin
A2 Howard, Clare
A2 Ju, Xiaotang
A2 Kanter, David
A2 Masso, Cargele
A2 Ometto, Jean Pierre
A2 Ramachandran, Ramesh
A2 Van Grinsven, Hans
A2 Winiwarter, Wilfried
K1 nitrogen
K1 circular economy
K1 pollution
YR 2019
FD 2019
LK https://wedocs.unep.org/handle/20.500.11822/27543
UL https://wedocs.unep.org/handle/20.500.11822/27543
NO Nitrogen is an extremely abundant element in the Earth’s atmosphere. In the form of the N2 molecule, nitrogen is harmless, making up 78 per cent of every breath we take. The two nitrogen atoms are held together by a strong triple bond (N N), making it extremely stable and chemically unreactive. The planet benefits because N2 allows a safe atmosphere in which life can flourish, while avoiding the flammable consequences of too much oxygen. The environmental interest in nitrogen focuses on the conversion of N2 into otherchemically reactive forms. For simplicity, scientists refer to all other nitrogen forms as “fixed” or “reactive nitrogen” (Nr).
DS UN Environment Document Repository
RD Sep 17, 2026