That's because mortality rates are increasing in some parts of the world. There's no sign of birthrate falling which is the only way to sustain life properly. In some parts of the world deaths from disease, starvation and war are increasing while in other parts (e.g. USA) birthrates are going up. Things are better in most of Europe where birth rates are declining to a sustainable level (i.e. two children per adult couple).
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Originally Posted by zan  incidentally, on a slight aside, the growth rate of the human population is slowing. We are due to stop increasing altogether when we hit about 9 billion people, because that's about the point when we will reach the limit of the food\energy\space we can get per capita. This assumes of course that we don't all migrate to the moon or discover how to mine energy from the planet's core or something! |