The Oil Sands, the world's second-largest proven reserves after Saudi Arabia, hold out the promise of energy security for the United States and economic security for Canada. But environmentalists fear the destructive, energy intensive process of extracting the oil will carry direct consequences for the planet. Despite the doubts, new oil sands projects are again springing up after the financial crisis halted development. How will oil companies balance the quest for more oil with environmental concerns? Mar. 22-23 we'll put those questions to the oil companies, environmental groups and government officals at the first Reuters Canadian Oil Sands Summit in Calgary.