The comment period for theOil Shale/Tar Sands PEIS Comment Period Open Until 3/20/08, according to the Oil Shale and Tar Sands Programmatic EIS Information Center. Be sure to get your comments in on the efforts to produce cheap hydrocarbons from rock with an energy density the same as that of potatoes, using a process that will require more CO2 belching coal-fired power plants and use up the remaining undeveloped water in the Upper Colorado River system. Category: 2008 Presidential ElectionCoyote Gulch