Summary: <p><span style="">Enbridge Energy wants to replace one of its pipelines to carry more tar sands oil. The federal government is examining whether that kind of oil could damage pipelines.<span> </span>Some critics say it’s too early for a new pipeline to be built, and they want to wait for the results of that study.<span> </span>We’ll hear why Enbridge says it doesn’t treat tar sands oil any differently from regular crude.</span></p>
