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The colored arrows represent nitrous oxide fluxes. Yellow arrows indicate anthropogenic, or human-caused, emissions. Green arrows show natural sources’ nitrogen contributions. Blue arrows indicate how much nitrogen is naturally removed from the atmosphere by sinks. (Photo credit: Modified from Tian et al. 2020, Nature; Global Carbon Project and International Nitrogen Initiative)
Sign up for new weekly newsletter Closing Arguments to get the latest about ongoing trials, major litigation and hot cases and rulings in courthouses around the U.S. and the world.
