Russ Heinl/Shutterstock Chevron’s recent sale of its Alberta oil sands assets adds to the steady stream of foreign investors exiting the sector.Only three international oil companies (IOCs) — ConocoPhillips, Exxon Mobil and Shell — retain some exposure to Canadian oil sands, and all three have made recent investments. Oil sands’ hefty emissions footprint remains a big challenge, with Shell leading the pack at its Quest and Polaris carbon capture and storage (CCS) projects. Save for later Print Download Share LinkedIn Twitter The Issue