Former Alberta deputy minister of energy Grant Sprague tells Power & Politics the potential Alberta pipeline routes, shown in documents obtained by CBC News, come with 'significant concerns' that must be addressed, such as oil tanker bans and First Nations consultation. This show is also available on Spotify, Apple Podcasts, or your favourite podcast app: https://link.mgln.ai/A2q4qn »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS For breaking news, video, audio and in-