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| Mapping the world | Map of the worldwide internet connections Visualisatie van de connectiviteitslijnen wereldwijd. Uiteindelijk ontstaat er toch weer een organische structuur.
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Food for thought
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Not cleared to fly New Scientist 25 August 2011 During the SARS outbreak in 2003 and the swine flu pandemic of 2009, airports in some countries used fever detectors to try to spot passengers who might be infected. Unsurprisingly this didn't work terribly well. But what if fast, accurate tests were available? People could be swabbed when they check in and barred from flying if they test positive. Simply keeping people with potentially serious infectious diseases off airplanes would save lives, as microbes spread easily in crowded, poorly ventilated spaces. Stopping people flying can also slow the spread of a disease - and that might well buy the world time to make drugs or vaccines for a new disease. Many countries already restrict the travel and immigration of people with diseases such as HIV/AIDS and TB. Some see this as a violation of civil liberties. In the future, will we see people barred for carrying, say, antibiotic-resistant superbugs? |
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| Urbanisatie | De wereldbevolking
telt anno 2011 bijna 7 miljard mensen. 50% hiervan woont in steden.
Ter vergelijking: Elke week verhuizen zo'n 1.3 miljoen nieuwe mensen naar de steden. Een miljard stedelingen woont in sloppenwijken. In 2025 verwacht de VN vijftien metropolen of megacities met meer dan 10 miljoen inwoners. In 2030 zal naar verwachting 61% in de steden wonen. Na 2040 zal de wereldbevolking naar verwachting zelfs groeien naar 8-9 miljard. |
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