CTV News.  A BP-ConocoPhillips venture planning to build a huge natural gas pipeline from Alaska to the Lower 48 is in early talks to join a competing project headed by TransCanada Corp. and Exxon Mobil Corp. , according to a source familiar with the projects.  The BP-ConocoPhillips project, known as Denali, would likely be shelved as the two companies team with the TransCanada project, said the source, who is not authorized to discuss the status of the projects and requested anonymity. With a price tag up to $40-billion (U.S.), it’s [...]