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I'm an old school capitalist.
To look at the environmental cost of something, you can look at the monetary cost of it as one of the ingredients.
gasoline costs about 3 bucks a gallon, and if you get 50 mpg, then you can calculate cost per mile.
Likewise, cost per mile for an electric vehicle can be figured out.
Likewise, the initial costs of the vehicles can be directly obtained, as well as battery replacement costs.
Electric is more "efficient" for short trips then gas engines. Even cheaper is public transportation.
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