Why Saudi Arabia Is Building a Linear City

I do not think a linear city is really eco friendly. Well. Building the roadways underground might help a bit but could become a hazard. Cutting migration paths would pose a problem. I suppose that could easily be fixed by dividing the city up as needed.  As for power, sopar energy is only somewhat eco friendly. Making the materials needed for it isn't. A libral zone within a extremely conservative region is also a big target for terrorism. Destroy enough of those underground roads and you can have the city's transportation cut in half for weeks or even months.