The court cited examples of waste management techniques used in cities such as Paris and Stockholm.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/delhi-high-court-learn-other-countries-doesn%E2%80%99t-mean-you-send-study-groups
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waste-management
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/high-court
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waste-recycling
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/carbon-dioxide
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/methane
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/solid-waste