A 10-km stretch around the Nal Sarovar bird sanctuary has been declared as an Eco-Sensitive Zone (ESZ) as per the Supreme Court guidelines for conserving wildlife. Nal Sarovar sanctuary is spread over 120 sq km and thus a total of 197 sq km on its periphery will be declared as eco-sensitive, which means all activity that could harm the sanctuary will be prevented.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/nal-sarovar-gets-esz-status
[2] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ecosystems
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/birds
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/migratory-species
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/supreme-court