Well, the BBC touched on this last night, saying merrily that land wasn't an issue, as there'd be plenty to go round, for you could fit the whole 7 billion of us into France, alone...

Phew!

I was a bit worried until they came up with that one, being that we've tripled in size, number and dumbness since the 1950s alone.

Somehow though, I think Mother Nature will find a 'cure', even though it may be one that none will enjoy having to take..