A few reasons, off the top of my head: First, only some jobs can be done efficiently in a remote way. We should not be in a rush to generalize this to every jo

A few reasons, off the top of my head: First, only some jobs can be done efficiently in a remote way. We should not be in a rush to generalize this to every job. Second, public transit can be more energy and cost-efficient when in a denser context. In addition to public transit, there's also cargo transport for things like food, which given dense areas can be handled by more carbon efficient methods like water and rail instead of trucks. We haven't even touched on the efficiencies for water, sewer, and electrical infrastructure. Third, dense construction can be done with timber. We've now reached a point technologically where a 100m building can be constructed primarily out of wood (search "plyscraper"). Wood is a very ecologically friendly material, as using it means capturing carbon. Fourth and finally, building up instead of sprawling out means less deforestation, less draining wetlands, and less paving over prairies. In short there are a lot of factors that go into environmentally friendly living, and most of them favor higher density.