Canadian oil sands producer ready to begin digging pits in the US

[caption id="attachment_832195" align="aligncenter" width="600"] The company's pioneering process uses a citrus extract called d-Limonene as a solvent to separate bitumen from sand.[/caption] Canada’s U.S. Oil Sands (TSX-V:USO) is fine tuning details to open its mine in eastern Utah, one of...