Editing Exurb (section)

==Definitions==
The word ''exurb'' (a [[portmanteau]] of ''extra (outside)'' and ''urban'') was coined by [[Auguste Comte Spectorsky]], in his 1955 book ''The Exurbanites'', to describe the ring of prosperous communities beyond the [[suburb]]s, that are [[commuter town]]s for an urban area.<ref>{{cite book |last=Spectorsky |first=Auguste C. |title=The Exurbanites |year=1955 | publisher=J. B. Lippincott & Co. |location=Lippincott, Philadelphia |oclc =476943}}</ref> In other uses the term has expanded to include popular extraurban districts which nonetheless may have poor transportation and underdeveloped economies due to their distance from the [[urban center]].<ref name="Shenjia"/> 

Exurbs can be defined in terms of [[population density]] across the extended urban area, for example "the urban core (old urban areas including [[Siming, Xiamen|Siming]] and [[Huli, Xiamen|Huli]], where the population density is greater than 51 persons per ha), the suburban zone (old urban and new urban transitional zones including Haicang and Jimei, where the population density is greater than 8 persons per ha), and the exurban areas (newly urbanized areas including [[Tong'an, Xiamen|Tong'an]] and [[Xiang'an, Xiamen|Xiang'an]], where the population density is less than 8 persons per ha)".<ref name="Ren" /> The mixture of urban and rural environments raises ecological issues.<ref>{{cite journal|title=Dog vs. bear: release the hounds! A new weapon in the battle to keep New Jersey exurbs bear-free|last=Vinzant|first=Carol|journal=[[New York (magazine)|New York]]|date=17 December 2007|volume=40|number=45|page=2}}</ref><ref name="Ren">{{cite journal|author=Ren, Y., Wei, X., Wei, X., Pan, J., Xie, P., Song, X., Peng, D., & Zhao, J.|date=2011|title=Relationship between vegetation carbon storage and urbanization: A case study of Xiamen, China|journal=Forest Ecology and Management|volume=261|number=7|pages=1214–1223|doi=10.1016/j.foreco.2010.12.038}}</ref>