Quote:
Originally Posted by Muhnay
Grain was the oil of their time. The downfall for them was not enough grain, and the fact they relied on a far off distanced land to supply them.. kinda how we do now with oil.
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The US is also close to Canadian tar sands which could supply the US with oil and also has enough oil shale to supply itself for many, many decades.
While it is too expensive to use with today's technology, an oil crisis and/or the rising cost of oil would make it economically attractive.
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