Tyee: Efforts to develop oil sands in Alberta are serving as a model for many other nations eager to exploit similar reserves within their borders. Huge unconventional fuel reserves — extra heavy crude, oil sands and oil shale — lie untapped across the globe. These resources emit much more carbon than regular oil, causing green groups to call them climate killers. So far, only a small fraction of the planet’s unconventional oil has been tapped. Most countries lack the necessary capital, …