http://investmentwatchblog.com/world-population-is-shrinking-not-expanding-most-national-birthrates-are-below-the-replacement-level-of-2-1-children-per-woman/
I've been wondering about this, and considering what people do to the planet, I would say underpopulation is NOT a problem. Then again, I don't think there is such a thing as underpopulation. As far as I'm concerned, one human on planet Earth is one too many, though opinions may vary.
