re: Tesla Battery Swap Demo Thursday.

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until we solve the problem of running power plants without coal/gas/ect, we will still not be a whole lot better off IMO

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First, keep in mind that a power plant converts fossil fuels into energy more efficiently than a car engine does. Second, solar panels are quickly approaching dollar per watt parity with more traditional sources, and the days of solar being the cheapest means of energy production may be here sooner than you think.