[user104658]

Originally Posted by Niamh.

Yeah, we can't go on like we are, how long is that even sustainable? It's actually kind of scary when you start thinking about it.

I think the theoretical level for everyone to be sustained properly in something like 10 billion. But then, of course, the sad reality is that most people will simply NOT be sustained properly, so it could probably go much higher, just with a lot of places in a bad way.