It's really a non-problem...those cars becoming 'Increasingly common' is entirely a relative thing, like worrying about how cold you're going to get once you're a mile from home in a Florida-to-Baffin-Island hike...and the numbers would be even more trivial than they are, but for all the tax subsidies and credits they get. End those and the problem will go away, at least until there is two-orders-of-magnitude improvement in battery efficiency and it comes in at the same consumer price as the present stuff.