" ... the problem of people putting themselves in the way of natural disasters; building in flood plains or low beach areas or on known fault lines."

I agree with this, SRS. But 10 of millions of people throughout the world have no choice as to where they live as a result of over-population. At one time the human population of the planet was relatively low and, hence, only a handful of people were affected by each natural disaster. Now the population of the planet (plus associated infrastructure) is HUGE and ten of thousands of people are bound to be adversely affected every time the 'forces of nature unleash their fury'. Surely, its one of the most obvious of the many 'downsides' of uncontrolled population growth?