To achieve deep cuts in US emissions, state-driven policy is only slightly more expensive than nationally uniform policy


Nature Climate Change, Published online: 28 October 2021; doi:10.1038/s41558-021-01193-5

Using a multi-sector model of human and natural systems, we find that the nationwide cost from state-varying climate policy in the United States is only one-tenth higher than that of nationally uniform policy. The benefits of state-led action — leadership, experimentation and the practical reality that states implement policy more reliably than the federal government — do not necessarily come with a high economic cost.