Completely independent? No. Right now over half of our electricity comes from coal. The amount of work necessary to replace our coal infrastructure with that of cleaner, more renewable forms of energy, I think, would necessitate more than a lifetime.
I think we are already less dependent on coal. China is getting ready to meet peak coal production and the United States probably already has reached peaked production. Completely independent may be a while down the road, but alternative energy are already beginning to replace coal usage.
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