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I think they contain energy creation. Would love a more accurate ratio. "The avg carbon footprint of households living in the center of large, pop.-dense urban cities is about 50% below average, while households in distant suburbs are up to 2X average."
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Density drives down carbon along multiple vectors (transportation, heating/AC, rent > own, utilizations rates of everything) at once. Otoh I suspect long-distance air travel per capita is far higher in the coastal states. And industry should be amortized nationally to be fair.