US Emission Rule Change Would Outweigh Any Impact of Keystone XL.

A recent reports says that the Keystone pipelines effect on global warming would be "infinitesimal" and that changes already being worked on by the EPA would have far more meaningful effects…take a look.

http://www.nytimes.com/2014/04/22/business/energy-environment/us-emission-rules-would-far-outweigh-impact-of-keystone-pipeline.html