Since its origins as a fuel blendstock in the 1980s, ethanol production in the United States has primarily been a creature of public policy.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/agricultural-policy-essential-commodity
[2] http://admin.indiaenvironmentportal.org.in/category/author/todd-alexander
[3] http://admin.indiaenvironmentportal.org.in/category/journal/fuel
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/alternative-fuels
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ethanol
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy-policy
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fuel-pricing