At this point, there's only really one major obstacle preventing electric cars from replacing their fossil fuel counterparts: the cost and performance of batteries. There are other factors hindering things, including charging infrastructure, but those would be almost trivial if battery technology was sorted. Simply put, the lithium-ion batteries most EVs use are expensive to produce, and still don't deliver as much range as a gas vehicle. EVs can go reasonable distances these days -- even the Chevy Equinox EV gets up to 319 miles (513 kilometers) -- but cross-country trips can be slow and outright impractical if there aren't enough stations along the way.
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