ON October 31, 2011 the world’s population will top seven billion. That’s according to expert opinion and a recent article in Nature.[1]
Writing in 1798, when there were less than one billion people on planet earth, Thomas Malthus suggested that misery, vice and poverty would keep population in check. [2]
Malthus was wrong.
Where there is most poverty, population growth is accelerating, while in rich countries population growth is slowing. The average number of children per woman in the world’s poorest countries is 4.5, compared to 1.7 for developed countries.
It is small increases in wealth and education that can lower fertility and are likely to result in a slowing in the world’s population growth.
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1. Jeff Tollefson. Seven billion and counting. Nature 478, 300 (2011)
2. Thomas Malthus. An Essay on the principle of population. Thomas Malthus, 1798

ACCORDING to many commentators, one of the greatest challenges facing humanity in the twenty-first century is the protection and conservation of the environment. It’s a mainstream issue and not just in places like Australia. Indeed even the government of Hong Kong is now making environmental sustainability a key objective which it intends to integrate with economic and social objectives.
Jennifer Marohasy BSc PhD has worked in industry and government. She is currently researching a novel technique for long-range weather forecasting funded by the B. Macfie Family Foundation.