Editing Coke (fuel) (section)

===China===
Many historical sources dating to the 4th century describe the production of coke in [[ancient China]].<ref name=Ages>{{cite book|title=The Coming of the Ages of Steel|url=https://books.google.com/books?id=uMwUAAAAIAAJ&pg=PA54|access-date=17 January 2013|publisher=Brill Archive|page=55|id=GGKEY:DN6SZTCNQ3G|quote=Historic sources mention the use of coke in the fourth century AD|url-status=live|archive-url=https://web.archive.org/web/20130501155853/http://books.google.com/books?id=uMwUAAAAIAAJ&pg=PA54|archive-date=1 May 2013|year = 1961}}</ref> The Chinese first used coke for heating and cooking no later than the 9th century.{{Citation needed|date=September 2013}} By the first decades of the 11th century, Chinese ironworkers in the [[Yellow River]] valley began to fuel their furnaces with coke, solving their fuel problem in that tree-sparse region.<ref>McNeil, William H. ''The Pursuit of Power''. University of Chicago Press, 1982, pp. 26, 33, and 45.</ref> By 1078 CE, the implementation of coke as a replacement to charcoal in the production of iron in China dramatically increased the industry to 125,000 tons per year. The iron was used for the creation of tools, weapons, chains for suspension bridges, and Buddhist statues.<ref>{{Cite book |last=Ebrey |first=Patricia B |title=Cambridge Illustrated History of China |publisher=Cambridge University Press |year=2010 |isbn=978-0521435192 |edition=2nd |location=Cambridge |publication-date=2010 |pages=143–144 |language=English |chapter=Shifting South: The Song Dynasty}}</ref>

China is the largest producer and exporter of coke today.<ref>He, Q., Yan, Y., Zhang, Y. et al. Coke workers’ exposure to volatile organic compounds in northern China: a case study in Shanxi Province. Environ Monit Assess 187, 359 (2015). {{doi|10.1007/s10661-015-4582-7}}</ref> China produces 60% of the world's coke. Concerns about [[air pollution]] have motivated technological changes in the coke industry by elimination of outdated coking technologies that are not energy-efficient.<ref>{{cite journal |last1=Huo |first1=Hong |last2=Lei |first2=Yu |last3=Zhang |first3=Qiang |last4=Zhao |first4=Lijan |last5=He |first5=Kebin |title=China's coke industry: Recent policies, technology shift, and implication for energy and the environment |journal=Energy Policy |date=December 2010 |volume=51 |pages=391–404 |doi=10.1016/j.enpol.2012.08.041 |url=https://www.sciencedirect.com/science/article/abs/pii/S0301421512007239 |access-date=22 December 2020|hdl=2027.42/99106 |hdl-access=free }}</ref>