FILE PHOTO: Rows of steam generators line a road at

FILE PHOTO: Rows of steam generators line a road at the Cenovus Energy Christina Lake Steam-Assisted Gravity Drainage (SAGD) project 120 km (74 miles) south of Fort McMurray, Alberta, August 15, 2013. Cenovus currently produces 100,000 barrels of heavy oil per day at their Christina Lake tar sands project. REUTERS/Todd Korol