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Replied toraahoo 6m ago
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As per the Union of Concerned Scientists…
In the article, “What Are Tar-sands?” posted Feb 23, 2016…
“Tar-sand oil currently accounts for about 5 percent of all U.S. gasoline; however, it has a disproportionate environmental impact.” Producing a gallon of gasoline made from tar-sands emits “about 15% more CO2” than is released from a gallon of conventional oil.”
Tar-sands also impact precious water supplies. The article states that, “Every gallon of gasoline produced by tar-sands requires roughly three times as much water as is used to extract conventional oil.” And much of that water is polluted by toxic substances harmful to human health and the environment.
The Canadians for a Sustainable Society website, states that, “global tar-sand reserves contain as much as 167 billion barrels of useable oil, providing the potential for big profits,” however, since tar-sand is expensive to extract, they suggest that consistently “high oil prices help guarantee profits.”
On the investment side…
In their article, “Are Oil Sands Profitable,” the Society reports that the average Estimated Return On Investment (EROI) of conventional world oil is “about 17:1,” while the EROIs for tar-sand oil is “as low as 3.5:1… much lower than solar’s 8:1, or wind’s 15:1.”
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