Fairly sharing 1.5: national fair shares of a 1.5 °C-compliant global mitigation effort
Tóm tắt
The problem of fairly distributing the global mitigation effort is particularly important for the 1.5 °C temperature limitation objective, due to its rapidly depleting global carbon budget. Here, we present methodology and results of the first study examining national mitigation pledges presented at the 2015 Paris climate summit, relative to equity benchmarks and 1.5 °C-compliant global mitigation. Uniquely, pertinent ethical choices were made via deliberative processes of civil society organizations, resulting in an agreed range of effort-sharing parameters. Based on this, we quantified each country’s range of fair shares of 1.5 °C-compliant mitigation, using the Climate Equity Reference Project’s allocation framework. Contrasting this with national 2025/2030 mitigation pledges reveals a large global mitigation gap, within which wealthier countries’ mitigation pledges fall far short, while poorer countries’ pledges, collectively, meet their fair share. We also present results for individual countries (e.g. China exceeding; India meeting; EU, USA, Japan, and Brazil falling short). We outline ethical considerations and choices arising when deliberating fair effort sharing and discuss the importance of separating this choice making from the scholarly work of quantitative “equity modelling” itself. Second, we elaborate our approach for quantifying countries’ fair shares of a global mitigation effort, the Climate Equity Reference Framework. Third, we present and discuss the results of this analysis with emphasis on the role of mitigation support. In concluding, we identify twofold obligations for all countries in a justice-centred implementation of 1.5 °C-compliant mitigation: (1) unsupported domestic reductions and (2) engagement in deep international mitigation cooperation, through provision of international financial and other support, or through undertaking additional supported mitigation activities. Consequently, an equitable pathway to 1.5 °C can only be imagined with such large-scale international cooperation and support; otherwise, 1.5 °C-compliant mitigation will remain out of reach, impose undue suffering on the world’s poorest, or both.
Tài liệu tham khảo
Anderson, K. (2015). Duality in climate science. Nature Geoscience. doi:10.1038/ngeo2559.
Athanasiou, T., Baer, P., & Kartha, S. (2006). Greenhouse development rights: An approach to the global climate regime that takes climate protection seriously while also preserving the right to human development. Berkeley; London: EcoEquity; Christian Aid. http://gdrights.org/wp-content/uploads/2009/03/gdrs_nairobi.pdf.
Athanasiou, T., Kartha, S., & Baer, P. (2014). National fair shares: The mitigation gap—Domestic action and international support. Berkeley and Somerville: EcoEquity and Stockholm Environment Institute. http://www.ecoequity.org/wp-content/uploads/2014/11/National-fair-shares.pdf.
Baer, P., Athanasiou, T., Kartha, S., & Kemp-Benedict, E. (2008). The greenhouse development rights framework. The right to development in a climate constrained world, second edition. Berlin: Heinrich Böll Foundation, Christian Aid, EcoEquity and the Stockholm Environment Institute. http://www.ecoequity.org/docs/TheGDRsFramework.pdf.
Caney, S. (2009). Justice and the distribution of greenhouse gas emissions. Journal of Global Ethics. doi:10.1080/17449620903110300.
CAT. (2016). Global temperatures. Climate Action Tracker. http://climateactiontracker.org/global.html.
Chung, R. K. (2007). A CER discounting scheme could save climate change regime after 2012. Climate Policy. doi:10.1080/14693062.2007.9685647.
CSO Review. (2015). Fair shares: A civil society equity review of INDCs. Manilla, London, Cape Town, Washington, et al.: CSO Equity Review Coalition. civilsocietyreview.org/report.
CSO Review. (2016). Setting the path towards 1.5 °C: A civil society equity review of pre-2020 ambition. Manilla, London, Cape Town, Washington, et al.: CSO Equity Review Coalition. civilsocietyreview.org/report2016.
Faran, T. S., & Olsson, L. (2017). Geoengineering of climate change: Neither ethical, nor economical. Risk-reward nexus analysis of geoengineering. International environmental agreements: Politics, law and economics, special issue: Achieving 1.5 °C and climate justice.
Gupta, J., & Arts, K. (2017). Achieving the 1.5 °C objective: Just implementation through a right to (sustainable) development approach. International environmental agreements: Politics, law and economics, special issue: Achieving 1.5 °C and climate justice.
Höhne, N., den Elzen, M., & Escalante, D. (2014). Regional GHG reduction targets based on effort sharing: A comparison of studies. Climate Policy. doi:10.1080/14693062.2014.849452.
Höhne, N., den Elzen, M., & Weiss, M. (2006). Common but differentiated convergence (CDC): A new conceptual approach to long-term climate policy. Climate Policy, 6(2), 181–199. doi:10.1080/14693062.2006.9685594.
Holz, C. (2014). How can Canada’s contribution to climate action be shared fairly among provinces? Presented at the International Political Economy Network and Centre for International Policy Studies Speaker Series, Ottawa, September 13. http://cips.uottawa.ca/event/equity-in-the-greenhouse-fairly-sharing-canadas-climate-change-mitigation-effort-among-provinces-and-territories.
Holz, C., Athanasiou, T., & Kartha, S. (2017). Estimates of emissions levels associated with the intended nationally determined contributions (INDCs). Harvard Dataverse. doi:10.7910/DVN/RIBJXF.
IPCC. (2013). Climate change 2013: The physical science basis. Contribution of working group I to the fifth assessment report of the intergovernmental panel on climate change. In T. F. Stocker, D. Qin, G.-K. Plattner, M. Tignor, S. K. Allen, J. Boschung, et al. (Eds.). Cambridge, New York: Cambridge University Press. www.climatechange2013.org/images/report/WG1AR5_SPM_FINAL.pdf.
IPCC. (2014). Climate change 2014: Mitigation of climate change. Contribution of working group III to the fifth assessment report of the intergovernmental panel on climate change. Cambridge: Cambridge University Press. http://mitigation2014.org/report/final-draft.
Kartha, S., Athanasiou, T., & Baer, P. (2012). The north–south divide, equity and development—The need for trust-building for emergency mobilisation. In N. Hällström (Ed.), What next volume III: Climate, development and equity (pp. 47–71). Uppsala: The Dag Hammarskjöld Foundation. http://www.dhf.uu.se/publications/development-dialogue/dd61/.
Kartha, S., Athanasiou, T., Baer, P., & Kemp-Benedict, E. (2008). A call for leadership. A greenhouse development rights analysis of the EU’s proposed 2020 targets. Somerville and Berkeley: EcoEquity and Stockholm Environment Institute. http://gdrights.org/wp-content/uploads/2009/10/a_call_for_leadership.pdf.
Kartha, S., Athanasiou, T., Caney, S., Cripps, E., Dooley, K., Dubash, N. K., et al. (2017). Response to Robiou du Pont et al on climate equity. Nature Climate Change . https://ssrn.com/abstract=3022357.
Kemp-Benedict, E., Athanasiou, T., Baer, P., & Kartha, S. (2013). Calculations for the greenhouse development rights calculator. Stockholm Environmental Institute; EcoEquity.
Kemp-Benedict, E., Holz, C., Baer, P., Athanaisou, T., & Kartha, S. (2017). The climate equity reference calculator. Berkeley and Somerville: Climate Equity Reference Project (EcoEquity and Stockholm Environment Institute). https://calculator.climateequityreference.org.
Lahn, B. (2017). In the light of equity and science: Scientific expertise and climate justice after Paris. International environmental agreements: Politics, law and economics, special issue: Achieving 1.5 °C and climate justice.
Meinshausen, M., & Alexander, R. (2016). NDC & INDC factsheets. Version November 4, 2016, Metric GWP SAR. Melbourne: Australian-German Climate and Energy College. http://climate-energy-college.org/ndc-indc-factsheets.
Meyer, A. (2004). Briefing: Contraction and convergence. Proceedings of the Institution of Civil Engineers—Engineering Sustainability, 157(4). https://doi.org/10.1680/ensu.2004.157.4.189.
Pritchett, L. (2003). Who is not poor? Proposing a higher international standard for poverty (No. CBD Working Paper Number 33). Center for global development. https://www.cgdev.org/publication/who-not-poor-proposing-higher-international-standard-poverty-working-paper-33.
Pritchett, L. (2006). Who is not poor? Dreaming of a world truly free of poverty. The World Bank Research Observer. doi:10.1093/wbro/lkj002.
Rao, N. D. (2014). International and intranational equity in sharing climate change mitigation burdens. International Environmental Agreements: Politics, Law and Economics. doi:10.1007/s10784-013-9212-7.
Robiou du Pont, Y., Jeffery, M. L., Gütschow, J., Rogelj, J., Christoff, P., & Meinshausen, M. (2016). Equitable mitigation to achieve the paris agreement goals. Nature Climate Change. doi:10.1038/nclimate3186.
Rogelj, J., Luderer, G., Pietzcker, R. C., Kriegler, E., Schaeffer, M., Krey, V., et al. (2015). Energy system transformations for limiting end-of-century warming to below 1.5 °C. Nature Climate Change. doi:10.1038/nclimate2572.
Shue, H. (2015). Historical responsibility, harm prohibition, and preservation requirement: Core practical convergence on climate change. Moral Philosophy and Politics. doi:10.1515/mopp-2013-0009.
Shue, H. (2017). Climate dreaming: Negative emissions, risk transfer, and irreversibility. Journal of Human Rights and Environment. doi:10.2139/ssrn.2940987.
Stern, T. (2013). Chapter 13: Environment and other transnational scientific issues. In Digest of United States Practice in International Law (Vol. 2013, pp. 383–387). Washington, D.C.: Office of the Legal Adviser, United States Department of State. https://www.state.gov/s/l/2013/index.htm.
Swingle, C. (2016). Ambition and fairness: Understanding equity through intended nationally determined contributions (Senior Capstone Project for Environmental Studies). Williams College, Williamstown.
UNEP. (2015). The emissions gap report 2015. Nairobi: United Nations Environment Programme. http://uneplive.unep.org/media/docs/theme/13/EGR_2015_Technical_Report_final_version.pdf.
UNEP. (2016). The emissions gap report 2016. A UNEP synthesis report. Nairobi: United Nations Environment Programme. http://uneplive.unep.org/media/docs/theme/13/Emissions_Gap_Report_2016.pdf.
UNFCCC. (1992). United nations framework convention on climate change. Bonn: UNFCCC. http://unfccc.int/resource/docs/convkp/conveng.pdf.
UNFCCC. (2013). Report of the conference of the parties on its nineteenth session, held in Warsaw from 11 to 23 November 2013. Geneva: United Nations Office. http://unfccc.int/resource/docs/2013/cop19/eng/10a01.pdf.
UNFCCC. (2015a). Paris agreement. Geneva: United Nations Office. http://unfccc.int/files/meetings/paris_nov_2015/application/pdf/paris_agreement_english_.pdf.
UNFCCC. (2015b). Report of the conference of the parties on its twentieth session, held in Lima from 1 to 14 December 2014. Geneva: United Nations Office. http://unfccc.int/resource/docs/2014/cop20/eng/10a01.pdf.
UNFCCC. (2015c). Synthesis report on the aggregate effect of the intended nationally determined contributions. Bonn: UNFCCC. http://unfccc.int/resource/docs/2015/cop21/eng/07.pdf.
UNFCCC. (2016). Aggregate effect of the intended nationally determined contributions: An update. Synthesis report by the secretariat. Bonn: UNFCCC. http://unfccc.int/resource/docs/2016/cop22/eng/02.pdf.
USA. (2015). Intended nationally determined contribution. Washington, DC: U.S. Department of State. http://www4.unfccc.int/Submissions/INDC/Published%20Documents/United%20States%20of%20America/1/U.S.%20Cover%20Note%20INDC%20and%20Accompanying%20Information.pdf.
Winkler, H., Baumert, K., Blanchard, O., Burch, S., & Robinson, J. (2007). What factors influence mitigative capacity? Energy Policy. doi:10.1016/j.enpol.2006.01.009.
Winkler, H., Höhne, N., Cunliffe, G., Kuramochi, T., April, A., & de Villafrance Casas, M. J. (2017). Countries start to explain how their climate contributions are fair—More rigour needed. International environmental agreements: Politics, law and economics, special issue: Achieving 1.5 °C and climate justice. (forthcoming).
Winkler, H., & Rajamani, L. (2014). CBDR&RC in a regime applicable to all. Climate Policy. doi:10.1080/14693062.2013.791184.