Well duh, the only other ways are “be more energy efficient” (hard because they’re already good at that) or “get everyone to do less” (I’d approve of that, but most people don’t seem to).
Likewise, the cost of less people living there (or in any defined region) is less taxpayers, less people making stuff, and less people supplying stuff.
Likewise, the cost of less people living there (or in any defined region) is less taxpayers, less people making stuff, and less people supplying stuff.