Links:
[1] http://admin.indiaenvironmentportal.org.in/news/us-air-force-eyes-alternative-fuel-slashing-co2
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/planet-ark-australia
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/renewable-energy