Dr Hans Rosling was the the guy with the graph on Newsnight last night.
http://www.gapminder.org/
The graphic showed how birth rates in developing countries are reducing as they become steadily more developed and wealthy.
The graph is animated and Brazil's babies per family figure drifts towards a lower value. Dr Rosling made a throwaway comment to the effect that "Brazilians don't listen to what the Pope says" and that they're using contraception.
This is news to me and I'm sure it's news to the Pope too!
The upshot is that world population is now forecast to plateau in the next few decades, as prosperity filters out to the rest of the developing world.
Does this give you more hope for the future?
As a side-issue, was his remark believable?
Side issue to the side-issue: Was it tactless?