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Geography, 25.12.2019 22:31 vanessasantos2004vs
What is tar sand, or oil sand, and how is it extracted and converted to heavy oil? what are some environmental problems related to the use of this energy resource? what is shale oil and how is it produced? what are the major advantages and disadvantages of using heavy oils produced from tar sand and shale oil as energy resources?
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What is tar sand, or oil sand, and how is it extracted and converted to heavy oil? what are some en...
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