German article on CE.

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Werner, C.; Schmidt, H-P; Gerten, D.; Lucht, W.; Kammann, C. (2018): Biogeochemical potential of biomass pyrolysis systems for limiting global warming to 1.5 °C. In: Environ. Res. Lett. 13 (4), S. 44036. DOI: 10.1088/1748-9326/aabb0e.

"Our results show that meeting the 1.5 °C goal through mitigation strategies including large-scale NE with plantation-based PyCCS may require conversion of natural vegetation to biomass plantations in the order of 133–3280 Mha globally, depending on the applied technology and the NE demand. Advancing towards additional bio-oil sequestration reduces land demand considerably by potentially up to 60%, while the benefits from yield increases account for another 3%–38% reduction (equalling 82–362 Mha). However, when mitigation commitments are increased by high balancing claims, even the most advanced PyCCS technologies and biochar-mediated co-benefits cannot compensate for delayed action towards phasing-out fossil fuels."

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Lenzi, Dominic (2018): The ethics of negative emissions. In: Glob. Sustain. 1, S. 1455. DOI: 10.1017/sus.2018.5.

"Limiting dangerous climate change is widely believed to require negative emissions. This prospect has sparked concerns about whether negative emissions could be scaled up quickly enough, along with concerns about their likely ethical costs. Building upon scenario modelling, this paper examines ethical concerns with negative emissions via the comparison of three alternate climate futures. This paper shows that the severity of concerns depends upon implementation conditions, and especially the extent of deferred mitigation. Negative emissions can be a valuable means of limiting dangerous climate change, or an unjust gamble against the future."

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Reynolds, Jesse (2018): Governing Experimental Responses. Negative Emissions Technologies and Solar Climate Engineering. In Andrew Jordan, Dave Huitema, Harro van Asselt (Eds.): Governing Climate Change. Cambridge: Cambridge University Press, 285-302.

"This chapter places the governance of climate engineering in a polycentric governance conceptual framework. Following an introduction to climate engineering proposals and their governance needs, I discuss existing climate engineering governance. The chapter then explores the extent to which climate engineering governance is polycentric, prospects for its future polycentricity and what – if anything – this implies for climate governance more generally."

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