Still, both the IPCC models and the Nature Energy study are broad, large-scale assessments. The ideal energy mix a given place needs to quickly cut carbon emissions could vary based on many factors, including the availability of sun and wind for renewables. Because of this, a good path forward might be an inclusive, broad "clean energy standard," says Benson. Right now, she says, a lot of policies emphasize "renewables" in their wording, but pivoting to "clean energy" might add some crucial flexibility. "Then, where renewables are the best choice, you do renewables, but where CCS would make sense you could do that," says Benson. "[Different areas] would all be competing for what's the lowest cost, fastest way to decarbonize."