Links:
[1] http://admin.indiaenvironmentportal.org.in/news/delhis-first-bio-gas-plant-fuel-120-dtc-buses
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/biogas
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/natural-gas
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waste-energy
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi-transport-corporation-dtc
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi-jal-board-djb
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/power-industry
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ministry-new-and-renewable-energy
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cng
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sewage-treatment-plants-stp
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy