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In page Petroleum industry in Canada:

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Production from the Alberta oil sands is still in its early stages and the province's established bitumen resources will last for generations into the future. The Alberta Energy Regulator estimates that the province has 50 billion cubic metres (310 billion barrels) of ultimately recoverable bitumen resources. At the 2014 production rate of 366,300 m3/d (2.3 million bbl/d), they would last for about 375 years. The AER projects that bitumen production will increase to 641,800 m3/d (4.0 million bbl/d) by 2024, but at that rate they would still last for about 213 years.[2]:3-10–3-26 Because of the enormous size of the known oil sands deposits, economic, labor, environmental, and government policy considerations are the constraints on production rather than finding new deposits.