Associated Press: Royal Dutch Shell PLC has become the latest company to abandon efforts to turn Western Slope oil-shale into oil, joining a long line of companies in a boom and bust cycle in the region.
The company said energy markets have changed since the project started in 1982, and the company no longer wants to continue efforts to turn oily shale rock into liquid by heating the rock and pumping out the oil.
Chevron stopped its oil-shale research in Rio Blanco County in February 2012.
"We are exiting...