Fig. 1: Emissions ranges across scenarios.

The range of economy-wide greenhouse gas emissions (a) and energy CO₂ emissions (b) across models and scenarios, and the range of emission reductions in 2035 (c). The shading illustrates ranges across models for a given scenario. The faint lines within a shaded region show individual model results. The dashed gray line in both panels shows the emissions pathway associated with the official US Long-term Strategy¹⁸. The solid gray line in both panels shows historical emissions. Scenario assumptions are detailed in Table 1 and Methods. Historical emissions are from the US Environmental Protection Agency⁷⁵.