US Climate Envoy John Kerry spent this week in China on a mission to persuade the world's largest emitter of greenhouse gases to do more to keep climate change in check. China is the world’s largest emitter, producing an estimated 27% of global greenhouse gases, followed by the United States. China obtains roughly 60% of its power from coal and is opening more coal-fired power plants, while also committing to reducing its use of the fossil fuel. Related: China's moderate climate goals allow emissions to continue to rise China positioned itself as a leader on promoting renewable energy and reducing…