Grist: The price of crude oil has slumped to its lowest point in six years, and that has sent some major oil companies scrambling to get out of expensive tar-sands projects in Alberta, Canada. Shell has pulled out of one of its largest lease applications, and Petrochina is attempting to get rid of its tar-sands assets. Environmentalists have watched the slowdown with great hope.
Yet at the same time, some of those very same companies are positioning themselves to tap into an even more dirty and expensive...