The court also ordered toll collectors to put in place radio frequency identification systems at the nine main entry points in the city by November 30.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/sc-imposes-green-levy-trucks-entering-delhi
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-standard-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/undefineddelhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/supreme-court
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/heavy-duty-vehicle
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/emission-tax
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cse-study
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment-pollution-control-authority-epca
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control