Mumbai Metro Rail Corporation Ltd.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/metro-iii-will-reduce-co2-emissions-more-trees%E2%80%99
[2] http://admin.indiaenvironmentportal.org.in/category/author/veydaant-khanna
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/maharashtra
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mumbai
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/metro
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/carbon-dioxide
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control