As oil prices continue to reach record highs, the search for new sources of energy has led the world to Alberta, Canada, and its vast oil sands. If the oil price stays high and new technology permits, oil companies will move, with the Canadian government’s blessing, to extract the estimated 180bn barrels of crude to be found far deeper under 140,000 sq km of Alberta in what are the world’s largest proven oil deposits after Saudi Arabia. He says the greater energy needed to produce a barrel of oil from the sands means three times more greenhouse gas emissions than producing a barrel of conventional oil. The reality is that producing each barrel of oil from oil sands emits between three and five times as much carbon dioxide as a conventional barrel of oil. read more