Suncor Energy takes a shine to the cold of Canada. That country's largest energy firm explores for, processes, and markets oil and natural gas. In 2015 it reported gross proved and probable reserves of 7.6 billion barrels of oil equivalent. Suncor Energy was first company to produce commercial crude oil from Canada's Athabasca oil sands. Its Sunoco unit refines crude oil and processes and distributes fuels, petrochemicals, and heating oils, invests in renewable energy and operates a network of gas stations. In 2016 Suncor Energy acquired rival Canadian Oil Sands. Already a stakeholder, that year it also agreed to buy a majority stake in Canada's primary oil sands project, Syncrude.