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Here's another aspect to this issue: if you get an EV such as a Leaf, and you then get solar PV on your house - you will then save most or possibly all of the energy costs for driving an EV. And the cost of the solar PV system will often pay for itself (even without the EV savings) in about 10 years.
The other point I'll make is that some EV drivers primarily do so because we want to not use fossil fuels. Electricity is improving on this all the time, whether or not we individually generate our own electricity.
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