New climate scenarios indicate that the most extreme high-emissions projections, such as RCP8.5 and SSP5-8.5, are no longer realistic. This shift suggests that global efforts to reduce carbon emissions are having a measurable impact on future climate trajectories. While the worst case is becoming less likely, the data also shows that the best case scenarios for rapid decarbonization have not been met. The updated models provide a more accurate baseline for climate policy and energy transition planning.
