* Environment* In theory, cities are better. It's cheaper to build a road network for 10 million people than 1000 road networks for 10,000 people. You can ship

* Environment* In theory, cities are better. It's cheaper to build a road network for 10 million people than 1000 road networks for 10,000 people. You can ship stuff in with container ships, rather than trucks. But this might cause people to be more wasteful. Everything is cheap and accessible, so they consume more stuff.