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Environmental News Network – Global Food Production Poses an Increasing Climate Threat

October 8, 2020012
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The growing use of nitrogen fertilizers in the production of food worldwide is increasing concentrations of nitrous oxide in the atmosphere—a greenhouse gas 300 times more potent than carbon dioxide and which remains in the atmosphere longer than a human lifetime.

The growing use of nitrogen fertilizers in the production of food worldwide is increasing concentrations of nitrous oxide in the atmosphere—a greenhouse gas 300 times more potent than carbon dioxide and which remains in the atmosphere longer than a human lifetime.

The study, which was undertaken by an international consortium of 57 scientists from 14 countries and 48 research institutions, with IIASA in a key role, was led by Auburn University Alabama, USA under the umbrella of the Global Carbon Project and the International Nitrogen Initiative. The researchers’ objective was to produce the most comprehensive assessment to date of all sources and sinks of the potent greenhouse gas nitrous oxide.

The findings point to an alarming trend affecting climate change: Nitrous oxide has risen 20% from pre-industrial levels and its growth has accelerated over recent decades due to emissions from various human activities.

Read more: International Institute for Applied Systems Analysis

The colored arrows represent nitrous oxide fluxes (in Tg N yr?1 for 2007-2016) as follows: yellow, emissions from anthropogenic sources (agriculture and waste water, biomass burning, fossil fuel and industry, and indirect emission); Green, emissions from natural sources; Blue, atmospheric chemical sink; Other fluxes: Lightning and atmospheric production, soil surface sink, climate change, increasing CO2, deforestation. (Photo Credit: modified from Tian et al. 2020, Nature; Global Carbon Project (GCP) and International Nitrogen Initiative (INI).)

 

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