Many biofuels are associated with lower greenhouse gas emissions but have greater aggregate environmental costs than gasoline.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/how-green-are-biofuels
[2] http://admin.indiaenvironmentportal.org.in/category/author/jorn-p-w-scharlemann
[3] http://admin.indiaenvironmentportal.org.in/category/author/william-f-laurance
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/land-use
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bio-fuel-crops
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/food-prices
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/deforestation
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ethanol
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-mitigation
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/biofuel
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/science
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/food-security