Nice study - but it forgets to "bill" urban areas for the energy used by mass transit, and it doesn't bill them for the extra energy it takes to provide service

Nice study - but it forgets to "bill" urban areas for the energy used by mass transit, and it doesn't bill them for the extra energy it takes to provide services to them. Shipping things to urban areas whether to a house or a store takes far more energy than to a suburban area because you have to ship smaller quantities more frequently (due to lack of storage). But this study doesn't include that. It's really not hard to check for yourself: Compare the prices of some item in an urban store vs a suburban store - it's way cheaper out of the city. That extra cost is there because of the extra energy it takes.