Taxing interacting externalities of ocean acidification, global warming, and eutrophication
Hänsel, Martin C. (Potsdam Institute for Climate Impact Research)
van den Bergh, Jeroen C. J. M. (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)

Data:	2021
Resum:	We model a stylized economy dependent on agriculture and fisheries to study optimal environmental policy in the face of interacting external effects of ocean acidification, global warming, and eutrophication. This allows us to capture some of the latest insights from research on ocean acidification. Using a static two-sector general equilibrium model we derive optimal rules for national taxes on (Formula presented. ) emissions and agricultural run-off and show how they depend on both isolated and interacting damage effects. In addition, we derive a second-best rule for a tax on agricultural run-off of fertilizers for the realistic case that effective internalization of (Formula presented. ) externalities is lacking. The results contribute to a better understanding of the social costs of ocean acidification in coastal economies when there is interaction with other environmental stressors. Recommendations for Resource Managers: Marginal environmental damages from (Formula presented. ) emissions should be internalized by a tax on (Formula presented. ) emissions that is high enough to not only reflect marginal damages from temperature increases, but also marginal damages from ocean acidification and the interaction of both with regional sources of acidification like nutrient run-off from agriculture. In the absence of serious national policies that fully internalize externalities, a sufficiently high tax on regional nutrient run-off of fertilizers used in agricultural production can limit not only marginal environmental damages from nutrient run-off but also account for unregulated carbon emissions. Putting such regional policies in place that consider multiple important drivers of environmental change will be of particular importance for developing coastal economies that are likely to suffer the most from ocean acidification.
Nota:	Unidad de excelencia María de Maeztu CEX2019-000940-M
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Climate policy ; Eutrophication ; Externalities ; General equilibrium ; Global warming ; Ocean acidification ; SDG 2 - Zero Hunger ; SDG 8 - Decent Work and Economic Growth ; SDG 13 - Climate Action ; SDG 14 - Life Below Water ; SDG 15 - Life on Land
Publicat a:	Natural Resource Modeling, Vol. 34, Issue 3 (August 2021) , art. e12317, ISSN 1939-7445

DOI: 10.1111/nrm.12317

22 p, 1.1 MB

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