MN ST.PAUL STAR TRIB: Draw a line on tar sands

http://www.startribune.com/opinion/commentary/39685982.html?elr=KArksc8P:Pc:U0ckkD:aEyKUiD3aPc:_Yyc:aULPQL7PQLanchO7DiUr

Joris Voorhoeve: Draw a line on tar sands

"Canada hopes to be freed of environmental obligations so it can develop a very dirty method of oil extraction. This would be a horrible precedent."