Runner, a fundamentalist Christian who thinks that evolution "is crap" and from his own account, has not been to university, let alone studied science or mathematics, tells us that overpopulation is not a problem. Britain's Chief Scientist tells us that it is an extremely serious problem, that world food stocks are at their lowest level in 50 years. The UN-sponsored Millenium Ecosystem Assessment, to which 1360 scientists contributed, says in its report that "the ability of the planet's ecosystem to sustain future generations can no longer be taken for granted". I wonder who we should believe?

If Runner lives in a city, perhaps he can test his view that there is plenty of water for a lot more people by watering his garden on the wrong day in full view of one of those white water restriction cars.

For those who share's runner's views you do not need to have been to university to know that unlimited growth is a problem. A very easy way to understand why it is an issue can be found here http://globalpublicmedia.com/lectures/461