Editing Doñana National Park (section)

===Overexploitation of water resources===
Another environmental problem is water withdrawals for irrigation, many of them illegal, which have doubled since the late 1980s to maintain water-intensive crops such as cotton, rice and more recently strawberries. The latter are grown in greenhouses, with an estimated area under plastic of between 4,500 and 6,000 hectares in the Doñana area, producing over 90% of the Spanish strawberry crop. The boring of illegal wells to draw irrigation water from underground aquifers has apparently proliferated,<ref>{{cite news|title=Spanish national park could lose Unesco status over illegal boreholes|url=https://www.theguardian.com/environment/2013/jun/28/strawberry-spain-donana-wildlife-iberian-lynx|access-date=23 March 2014|newspaper=The Guardian|date=28 June 2013|author=James Bryce|archive-url=https://web.archive.org/web/20130908142203/http://www.theguardian.com/environment/2013/jun/28/strawberry-spain-donana-wildlife-iberian-lynx|archive-date=8 September 2013|location=Seville|quote=Some producers in the area are accused of using illegal boreholes to draw water from underground aquifers, which the fragile ecosystem is dependent on to support a wide range of species.}}</ref> while the water demands of nearby residential complexes and inappropriate usage of the water resources of nearby rivers may also affect the [[hydrology]] of the park. Other potential risks include salinization resulting from climate change; the intrusion of salt water from the Atlantic would endanger several animal species. On the other hand, desertification could also occur; recently a transfer from the Chanza-Piedras water system was approved by the ''Diputación de Huelva'' (Provincial Council of Huelva) to alleviate this eventuality.<ref>{{cite news|title=La Diputación respalda el trasvase de agua del sistema Chanza-Piedras|url=http://www.huelvainformacion.es/article/provincia/1303517/la/diputacion/respalda/trasvase/agua/sistema/chanzapiedras.html|access-date=23 March 2014|newspaper=Huelva Informacion|date=10 July 2012|author=S.P.|archive-url=https://web.archive.org/web/20140323225511/http://www.huelvainformacion.es/article/provincia/1303517/la/diputacion/respalda/trasvase/agua/sistema/chanzapiedras.html|archive-date=23 March 2014|location=Huelva}}</ref>