Land in Vasant Vihar which is part of the Aravalli ecosystem was wrecked by stone mining. Scientists are now restoring greenery to attract lost species and trap pollutants.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/life-blossoms-again-ravaged-aravallis
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/biodiversity
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/aravalli-range
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ecosystems
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/forests
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/flora
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment-management