Chennai already has the dubious distinction of having the lowest green cover among all the metropolitan cities in the country and the gap seems to be only widening.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/chennai%E2%80%99s-green-cover-shrinking-needs-structural-plan-finds-report-0
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/new-indian-express-chennai
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tamil-nadu
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/chennai
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/forests
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/forest-policy
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/adyar