The China Energy Outlook provides a detailed review of China's energy use and trends. China is the world’s largest consumer and producer of primary energy as well as the world’s largest emitter of energy-related carbon dioxide (CO2). China surpassed the U.S. in primary energy consumption in 2010 and in CO2 emissions in 2006. In 2018, China was responsible for 21% of total global primary energy use and about 29% of global energy-related CO2 emissions.