MNN - Mother Nature Network

<div> <img alt="" src="/sites/default/files/user-75/poll_tarsands.jpg" /></div> <div> &nbsp;</div> <div> TransCanada&#39;s proposed Keystone XL pipeline would link Canadian tar sands to Texas oil refineries. The U.S. State Department must approve the <a href="http://www.mnn.com/earth-matters/politics/blogs/emails-show-cozy-ties-in-pipeline-review">controversial, 1,600-mile oil pipeline project</a> since it crosses a national border.</div>