http://en.wikipedia.org/wiki/Keystone_Pipeline
http://www.transcanada.com/keystone.html
http://keystone-xl.com/
Articles
http://www.ottawacitizen.com/entertainment/movie-guide/Canadian+Keystone+pipeline+project+draws+climate+change/7977786/story.html
http://www.globalnews.ca/pros+and+cons+of+the+keystone+xl+pipeline+project/6442489765/story.html
http://www.psu.edu/dept/e-education/blogs/egee120/2013/01/keystone-pipeline-a-project-of-controversy--chris-hickey.html
http://www.motherjones.com/environment/2015/05/canada-alberta-notley-election-keystone-pipeline-climate
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