GLOBAL N CYCLE ALTERED BY MAN. “As a consequence of anthropogenic inputs, the global nitrogen cycle has been significantly altered over the past century. Global atmospheric nitrous oxide (N2O) mole fractions have increased from a pre-industrial value of ~270 nmol/mol to ~319 nmol/mol in 2005. Human activities account for over one-third of N2O emissions, most of which are due to the agricultural sector.””
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http://lnkd.in/de_n6xw