The fact that a Harley buzzes up and down my street at 3am makes me believe silent is the way to go. Total efficiency would be the absence of sound. Not only does the Prius directly pollute the air less as it drives, it emits less sound pollution.
Imagine how much quieter and pleasant life could be in a populated area if all cars were silent. If all outdoor lighting (e.g. street lights, porch lights, etc.) could be removed and cars made silent, the quality of suburban life would shoot up immensely.
- LostCause
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