mixtures of sand, clay, water, and bitumen which is saturated with a thick form of petroleum. About 40,000 years ago, bitumen was first used by Neanderthals. Bitumen was mainly used back in the days for construction of buildings and water proofing of reed boats. The largest sources of bitumen are in Alberta, known as Athabasca oil sands. The largest reserves in the world are in Canada, Kazakhstan, and Russia at an estimate of 249.67 billion barrels; 176.8 billion barrels in Canada alone. Oil…
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