[youtube]http://www.youtube.com/watch?v=vZVOU5bfHrM&feature=player_embedded[/youtube]

I suppose the above is possible, but why might the Earth’s population decline after reaching 9 billion in 2050? Deficit fertility rates?

In any case, check out the follow-up shorts as well: Offsetting low fertility rates, Food: There’s lots of it, and Why poverty isn’t caused by overpopulation.

Pretty convincing thesis.