As Canadian Prime Minister Justin Trudeau considers whether to approve Teck Resources’ Frontier oil sands project, roughly 20 others sit on the shelf as companies delay investment decisions hoping for new pipelines and higher prices. These projects could bring a wave of some 2 million barrels per day (bpd) onto a market many view as already oversupplied. They also largely have approvals, underlining that Teck’s ( TECKb.TO ) Frontier is far from the only expansion path for Canada’s oil sands. Trudeau’s cabinet is expected to meet on Tuesday and decide on Frontier this week. […]