Of course it’s not going to be on the same order as literally dumping raw sewage into the surrounding area. But there is an enormous body of research demonstrating the overall drain of resources from economically-productive urban areas out to costly suburban ones.

Then there’s the carbon cost of enormous, congested highways and stroads where people idle in traffic for hours of their day. Or the overall inefficiency of providing general city services (water, power, sewer) to people in comparatively sparse areas (which ties back into the resource drain imposed on denser areas).