Can public agencies efficient facilitate sustainable energy strategies that can be used to increase the efficiency of global climate policy? We focus on the specific case of climate partnership between Denmark, a global leader within wind power, and China, the world’s largest CO ₂ emitter. Based on theory and empirical data, we argue that the strategy of climate partnership can help both partners obtain a more sustainable energy policy with a larger positive effect on climate change as well as increase the income of both state and businesses through an increased level of green exports. The climate partnership model between Denmark and China, as facilitated by the Danish Energy Agency, creates such a win-win situation supported by the main stakeholders. This low-cost policy suggests that public agencies worldwide such as the European External Action Service (EEAS) should expand the number of such efficient climate partnerships.