http://whitehouse.blogs.cnn.com/2011/12/21/obamas-epa-draws-praise-fire-over-new-emission-regulations/
http://www.epa.gov/chp/state-policy/renewable_fs.html
http://www.reuters.com/article/2011/12/15/us-dukeenergy-progressenergy-idUSTRE7BE14020111215