Outside of being a hot-button environmental issue, TransCanada's (NYSE:TRP) Keystone XL is having a major impact on the depressed price of Canadian crude oil. In this video, Fool.com contributor Aimee Duffy takes a look at a handful of pipeline projects that have yet to be realized that are having a devastating impact on Canadian energy stocks.

Motley Fool contributor Aimee Duffy has no position in any stocks mentioned. Motley Fool contributor Tyler Crowe has no position in any stocks mentioned. For more energy information, follow them on Twitter, @TMFDuffy and @TylerCroweFool.

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