(c) 2009 F. Bruce Abel
The problem oil sands has with environmentalists. Implies that such oil is banned by the US. Presented as a PR problem. Some of the comments after the article are excellent.
Keep in mind we're talking of oil, not natural gas, in this article, I believe.
http://www.calgaryherald.com/business/Yedlin+Energy+sector+losing+battle/2019740/story.html