This is one biofuel that lives up to its green billing in more ways than one. It's an emerald-green crude oil, produced by photosynthesis in algae, which could fuel cars, trucks and aircraft - without consuming crops that can be used as food.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/algae-oil-promises-truly-green-fuel
[2] http://admin.indiaenvironmentportal.org.in/category/journal/new-scientist
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/alternative-fuels
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/biofuel
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy-technology
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us