Fig. 2: CO₂ emissions and climate outcomes.

Global outcomes for the six scenario narratives (see Fig. 1) under a 2 °C end-of-century temperature target: a gross fossil fuel and industry CO₂ emissions, b CO₂ removal via DACCS, BECCS, and biomass liquids, c global mean temperature change, and d global carbon price. We show four of the six global carbon price pathways because scenarios without policy adjustment (indicated by the tag Keep Tax) follow the same carbon price trajectories as the Plan High & Learn High or Plan Low & Learn Low scenarios. Our policy does not directly include a tax on emissions from the land sector, but these emissions do vary across scenarios due to differences in bioenergy use (see SI Fig. S2).