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- W164127993 abstract "Nitrogen species have several environmental effects when emitted to water and air, such as eutrophication and acidification but they may also alter the ozone concentration in the troposphere and stratosphere. These effects have not received much attention in the climate and environmental debates, instead the focus has been on carbon emissions. Nitrogen footprint is a newly introduced concept among the environmental footprints, where the carbon footprint is the most known. The nitrogen footprint strives to account for the total nitrogen released during the life cycle of a product or similar. In life cycle impact assessment (LCIA) methods, nitrogen is assessed among other substances for several impact categories. This thesis explores how nitrogen species are evaluated in the nitrogen footprint method and the LCIA methods for global warming, eutrophication, acidification, photochemical ozone formation and stratospheric ozone depletion. Using a case study, of Swedish grown tomatoes, the methods were compared and evaluated. The different approaches yielded different results because the nitrogen footprint method does not distinguish between different nitrogen species and therefore the environmental impacts can currently not be identified with this method. The LCIA methods are more comprehensive as they identify the environmental impacts induced by nitrogen emissions through scientifically derived factors, thereby giving a more comprehensive description of the spectra of impacts. It also became evident during this study that LCIA does not recognise nitrous oxide as an ozone depleting substance and therefore no result for the stratospheric ozone depletion impact category could be derived in the case study. The footprint concept applied in a broader perspective could be used as a tool to communicate and raise awareness of the environmental impacts from nitrogen emissions. Additionally, the nitrogen footprint concept could be valuable in bringing the nitrogen perspective back into the environment and climate debate, as well as in LCAs." @default.
- W164127993 created "2016-06-24" @default.
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- W164127993 date "2012-01-01" @default.
- W164127993 modified "2023-09-28" @default.
- W164127993 title "Nitrogen footprint vs. life cycle impact assessment methods : a comparison of the methods in a case study" @default.
- W164127993 hasPublicationYear "2012" @default.
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