A pound of batteries has much less energy than a pound of gasoline. So you need a lot of batteries to go a reasonable distance. The weight of batteries is a bit of a problem, so the car makers work to make the rest of the car lighter to make up for it. It costs extra money to save the weight. At the end, though, the battery car is better than the gas car. Gas cars waste most of their energy, and they pollute a lot.
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