pathways to a low-carbon economy低碳经济的实现路径（麦肯锡mckinsey）

s projections for CO emissions from land use and land-use change, and the US Environmental Protection Agency’s (EPA) projections for non-CO GHGs. See chapter 2 for details.Emissions relative to different GHG concentration pathwaysNote: As a reference, 1990 total emissions were 36 Gt COeSource: Global GHG Abatement Cost Curve v2.0; Houghton; IEA; ; den Elzen; Meinshausen; OECD; US EPA; van VuurenBusiness-as-usualTechnical measures < €60 per tCO2e(Focus of the study)Technical measures €60–100 per tCO2e(High-level estimates)- 4Peak at 550 ppm, long-term stabilization 550 ppmPeak at 510 ppm, long-term stabilization 450 ppmPeak at 480 ppm, long-term stabilization 400 ppmExhibit 2- 57032Behavior changes(High-level estimates)- 3823010203040506070Global GHG emissionsGtCO2e per year2005101520252030