The ecological consequences of declining nitrogen concentration in plants worldwide

Through fertilizer application and the combustion of fossil fuels, humans provide more nitrogen (N) to the Earth system than provided by natural processes, leading to the perception of N as a pollutant causing coastal eutrophication, low-oxygen dead zones, and impaired freshwater resources. However, recent environmental changes also include elevated atmospheric CO2 concentrations (eCO2), amounting to more than a 30% increase since 1960, largely driven by the combustion of fossil fuels.


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