Delivery of palatable 2 °C mitigation scenarios depends on speculative negative emissions or changing the past. Scientists must make their assumptions transparent and defensible, however politically uncomfortable the conclusions.
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Acknowledgements
I thank G. Peters and R. Andrew from CICERO, Oslo, for guidance with the IPCC scenario database and global cement emissions, respectively; K. West from the IEA, Paris, for information related to IEA cement scenarios; and M. Sharmina and J. Kuriakose for deforestation scenarios, and A. Bows-Larkin and J. Broderick for carbon budgets, from the Tyndall Centre, Univ. Manchester.
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Anderson, K. Duality in climate science. Nature Geosci 8, 898–900 (2015). https://doi.org/10.1038/ngeo2559
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DOI: https://doi.org/10.1038/ngeo2559
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