International audienceEnergy efficiency is likely to remain a valuable support for meeting climate challenges because it involves using less primary energy to produce the same final service. We explore energy efficiency potential in relation to different fossil fuel extraction cost schemes crossed with a carbon pricing scenario built using various global carbon taxes. This sensitivity analysis relies on prospective studies conducted with the technical-and-economic, bottom-up optimization model TIAM-FR (TIMES Integrated Assessment Model), where energy efficiency is endogenized

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