Observer: Todd Dahlman scoops up a handful of oily sand and smiles. ‘This is the money – it even smells like money,’ says the manager of Shell’s Muskeg River oil sands mine in the Athabasca region of North Alberta in Canada. We are standing in the middle of a pit 50m deep that giant diggers have hollowed out of the earth. Some 150m beneath our feet lie almost a billion barrels of oil. With Brent crude at $131 a barrel on Friday, the oil sands frenzy is in full swing. Canada holds …