As the world gathers in Lima to discuss next year's climate deadline, a lot of focus is on the US-China climate agreement. While alone that deal has not paved a pathway for a meaningful global agreement all the way to Paris, if you detour through New Delhi something intriguing and hopeful emerges.

National efforts to put a price on carbon in the United States largely petered out years ago, but the climate policy is gaining traction in a handful of states out west. The governors of California, Washington, and Oregon, along with the premier of British Columbia in Canada, signed an agreement Monday to coordinate efforts to reduce carbon emissions in the region. Washington and Oregon will aim to implement their own pricing structures to mimic those already in place in California and British Columbia.