Construction of the southern portion of the Keystone XL pipeline, environmentalists have opposed the pipeline because it will transport dirty tar sands oil from Alberta, contributing to global warming and raising the risk of pollution from pipeline leaks,
Construction of the southern portion of the Keystone XL pipeline, environmentalists have opposed the pipeline because it will transport dirty tar sands oil from Alberta, contributing to global warming and raising the risk of pollution from pipeline leaks,
Construction of the southern portion of the Keystone XL pipeline, environmentalists have opposed the pipeline because it will transport dirty tar sands oil from Alberta, contributing to global warming and raising the risk of pollution from pipeline leaks,


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