Until recently, Obama supported "coal to liquid" technology, which allows auto fuel to be squeezed out of coal. He touted it as a way to free America from reliance on Saudi oil fields and to tackle global warming. However, coal-to-liquid technology produces twice the amount of greenhouse gases that regular old oil does; additionally, it's so expensive that it's unlikely to displace one drop of cheap Saudi oil anytime soon.
So why would he back it? What's more, why did he...
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