World leaders finally called for a transition away from fossil fuels at the annual U.N. climate talks, but offered few details. A California delegation vows to create a model for rapid, equitable climate action.

By Liza Gross

California delegates to the United Nations’ 28th climate talks called the summit’s progress “lackluster” and, at a briefing last week, resolved to show the world how bold policies can pave the way toward a climate-safe future.