Last week, Premier Li Keqiang said China would cut its “carbon intensity”—the amount of carbon dioxide emitted per unit of GDP—to 60-65 percent of 2005 levels by 2030. Visiting Paris, the site in September of the United Nations Climate Change Conference, Li also reiterated that renewable energy should make up 20 percent of China’s primary energy supply by the same date. Could Beijing’s announcements signal it is at last getting out in front of China’s pollution problem, or, do they reflect a low-balled target that could let polluters off the hook in the coming years? Could the announcement pave the way for greater cooperation between China and the United States, the world’s second-largest emitter of CO2?—The Editors