China’s pursuit of energy security is not all bad news, or at least it doesn’t have to be. China, after all, shares with the United States and all consumer countries a strong interest in stable, affordable energy markets. That gives as much motive for cooperation as it does for competition. Pipeline politics can have a stabilizing effect, both for rivals, such as Russia, and for energy-poor countries that desperately need the resources. And China’s significant investments in renewables and recent commitments with the United States on greenhouse gas emissions could have a profound, positive effect on global environmental health.