My solar panels only have a plastic box on the back... I would imagine that it could be made out of aluminum or something else. But, if we can get down to 10% of our usage for absolutely necessary uses, I would be happy with that.
The big problem I see with oil and gasoline is that it has to be coming close to taking one gallon of gas to produce one gallon of gas at the pump. There are so many steps that are energy intensive in the processing of oil sands, and I would have to imagine that the quality of tar sands will drop as time goes forward. Plus, I doubt we have enough capacity to produce the oil needs of everyone in North America right now from the oil sands.
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