> my understanding is that Alberta's oil sands must be extracted via fracking https://www.oilsandsmagazine.com/technical/mining/surface-mining https://www.oils

> my understanding is that Alberta's oil sands must be extracted via fracking https://www.oilsandsmagazine.com/technical/mining/surface-mining https://www.oilsandsmagazine.com/technical/mining/surface-mi... and https://www.oilsandsmagazine.com/technical/mining https://www.oilsandsmagazine.com/technical/mining These are large surface mines. The economics of it have to do with the massive amount of earth moved, and the relatively low amount of oil recovered per unit volume... and the work needed to be done to restore the mine afterwards.