What is the cost efficiency of ensuring political stability in the Middle East?
Catalytic converters are not cost efficient. Neither are air bags, anti-lock brakes, crumple zones, crash testing, roadside barriers, signs, traffic enforcement or pot hole repair. Money is a means, so I'm not sure why it's the end of an efficiency analysis.
It's an interesting read, nonetheless. I imagine the battery packs are modular - why not allow consumers to buy the capacity they want/need (e.g., 10, 20, 30, 40 mi)?
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