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2C or Not 2C?

  • Céline Guivarch

    (Centre International de Recherche sur l’Environnement et le Développement)

  • Stéphane Hallegatte

    (Centre International de Recherche sur l’Environnement et le Développement and Ecole Nationale de la Météorologie, Météo-France)

Political attention has increasingly focused on limiting warming to 2°C. However, to date the only mitigation commitments accompanying this target are the so-called Copenhagen pledges, and these pledges appear to be inconsistent with the 2°C objective. Diverging opinions on whether this inconsistency can or should be resolved have been expressed. This paper clarifies the alternative assumptions underlying these diverging view points and explicits their implications. It first gives simple visualizations of the challenge posed by the 2°C target. It then proposes a “decision tree”, linking different beliefs on climate change, the achievability of different policies, and current international policy dynamics to various options to move forward on climate change.

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Paper provided by Fondazione Eni Enrico Mattei in its series Working Papers with number 2011.87.

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Date of creation: Dec 2011
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Handle: RePEc:fem:femwpa:2011.87
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  1. Jean-Charles Hourcade & Philippe Ambrosi & Stéphane Hallegatte & Franck Lecocq & Patrice Dumas & Minh Ha-Duong, 2003. "Optimal control models and elicitation of attitudes towards climate damages," Post-Print halshs-00000966, HAL.
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